Optimize ResTable::getLocales() to improve bindApplication performance

Change from linear searching for uniqueness to binary search.

Bug:27198799
Change-Id: I1ccb6e93cc213810848f07d631d9d8de7c719803

8 files changed, 343 insertions, 243 deletions

diff --git a/core/java/android/app/ResourcesManager.java b/core/java/android/app/ResourcesManager.java
index 4c4f128216f4..aef92cf21711 100644
--- a/core/java/android/app/ResourcesManager.java
+++ b/core/java/android/app/ResourcesManager.java
@@ -29,6 +29,7 @@ import android.content.res.ResourcesImpl;
 import android.content.res.ResourcesKey;
 import android.hardware.display.DisplayManagerGlobal;
 import android.os.IBinder;
+import android.os.Trace;
 import android.util.ArrayMap;
 import android.util.DisplayMetrics;
 import android.util.LocaleList;
@@ -430,37 +431,44 @@ public class ResourcesManager {
             @Nullable Configuration overrideConfig,
             @NonNull CompatibilityInfo compatInfo,
             @Nullable ClassLoader classLoader) {
-        final ResourcesKey key = new ResourcesKey(
-                resDir,
-                splitResDirs,
-                overlayDirs,
-                libDirs,
-                displayId,
-                overrideConfig != null ? new Configuration(overrideConfig) : null, // Copy
-                compatInfo);
-        classLoader = classLoader != null ? classLoader : ClassLoader.getSystemClassLoader();
+        try {
+            Trace.traceBegin(Trace.TRACE_TAG_RESOURCES,
+                    "ResourcesManager#createBaseActivityResources");
+            final ResourcesKey key = new ResourcesKey(
+                    resDir,
+                    splitResDirs,
+                    overlayDirs,
+                    libDirs,
+                    displayId,
+                    overrideConfig != null ? new Configuration(overrideConfig) : null, // Copy
+                    compatInfo);
+            classLoader = classLoader != null ? classLoader : ClassLoader.getSystemClassLoader();
 
-        if (DEBUG) {
-            Slog.d(TAG, "createBaseActivityResources activity=" + activityToken
-                    + " with key=" + key);
-        }
+            if (DEBUG) {
+                Slog.d(TAG, "createBaseActivityResources activity=" + activityToken
+                        + " with key=" + key);
+            }
 
-        synchronized (this) {
-            final ActivityResources activityResources = getOrCreateActivityResourcesStructLocked(
-                    activityToken);
+            synchronized (this) {
+                final ActivityResources activityResources =
+                        getOrCreateActivityResourcesStructLocked(
+                                activityToken);
 
-            if (overrideConfig != null) {
-                activityResources.overrideConfig.setTo(overrideConfig);
-            } else {
-                activityResources.overrideConfig.setToDefaults();
+                if (overrideConfig != null) {
+                    activityResources.overrideConfig.setTo(overrideConfig);
+                } else {
+                    activityResources.overrideConfig.setToDefaults();
+                }
             }
-        }
 
-        // Update any existing Activity Resources references.
-        updateResourcesForActivity(activityToken, overrideConfig);
+            // Update any existing Activity Resources references.
+            updateResourcesForActivity(activityToken, overrideConfig);
 
-        // Now request an actual Resources object.
-        return getOrCreateResources(activityToken, key, classLoader);
+            // Now request an actual Resources object.
+            return getOrCreateResources(activityToken, key, classLoader);
+        } finally {
+            Trace.traceEnd(Trace.TRACE_TAG_RESOURCES);
+        }
     }
 
     /**
@@ -490,8 +498,8 @@ public class ResourcesManager {
             }
 
             if (activityToken != null) {
-                final ActivityResources activityResources = getOrCreateActivityResourcesStructLocked(
-                        activityToken);
+                final ActivityResources activityResources =
+                        getOrCreateActivityResourcesStructLocked(activityToken);
 
                 // Clean up any dead references so they don't pile up.
                 ArrayUtils.unstableRemoveIf(activityResources.activityResources,
@@ -539,6 +547,7 @@ public class ResourcesManager {
         final String[] systemLocales = findSystemLocales
                 ? AssetManager.getSystem().getLocales() : null;
         final String[] nonSystemLocales = resourcesImpl.getAssets().getNonSystemLocales();
+
         // Avoid checking for non-pseudo-locales if we already know there were some from a previous
         // Resources. The default value (for when hasNonSystemLocales is true) doesn't matter,
         // since mHasNonSystemLocales will also be true, and thus isPseudoLocalesOnly would not be
@@ -613,16 +622,21 @@ public class ResourcesManager {
             @Nullable Configuration overrideConfig,
             @NonNull CompatibilityInfo compatInfo,
             @Nullable ClassLoader classLoader) {
-        final ResourcesKey key = new ResourcesKey(
-                resDir,
-                splitResDirs,
-                overlayDirs,
-                libDirs,
-                displayId,
-                overrideConfig != null ? new Configuration(overrideConfig) : null, // Copy
-                compatInfo);
-        classLoader = classLoader != null ? classLoader : ClassLoader.getSystemClassLoader();
-        return getOrCreateResources(activityToken, key, classLoader);
+        try {
+            Trace.traceBegin(Trace.TRACE_TAG_RESOURCES, "ResourcesManager#getResources");
+            final ResourcesKey key = new ResourcesKey(
+                    resDir,
+                    splitResDirs,
+                    overlayDirs,
+                    libDirs,
+                    displayId,
+                    overrideConfig != null ? new Configuration(overrideConfig) : null, // Copy
+                    compatInfo);
+            classLoader = classLoader != null ? classLoader : ClassLoader.getSystemClassLoader();
+            return getOrCreateResources(activityToken, key, classLoader);
+        } finally {
+            Trace.traceEnd(Trace.TRACE_TAG_RESOURCES);
+        }
     }
 
     /**
@@ -636,93 +650,104 @@ public class ResourcesManager {
      */
     public void updateResourcesForActivity(@NonNull IBinder activityToken,
             @Nullable Configuration overrideConfig) {
-        synchronized (this) {
-            final ActivityResources activityResources = getOrCreateActivityResourcesStructLocked(
-                    activityToken);
-
-            if (Objects.equals(activityResources.overrideConfig, overrideConfig)) {
-                // They are the same, no work to do.
-                return;
-            }
-
-            // Grab a copy of the old configuration so we can create the delta's of each
-            // Resources object associated with this Activity.
-            final Configuration oldConfig = new Configuration(activityResources.overrideConfig);
-
-            // Update the Activity's base override.
-            if (overrideConfig != null) {
-                activityResources.overrideConfig.setTo(overrideConfig);
-            } else {
-                activityResources.overrideConfig.setToDefaults();
-            }
-
-            if (DEBUG) {
-                Throwable here = new Throwable();
-                here.fillInStackTrace();
-                Slog.d(TAG, "updating resources override for activity=" + activityToken
-                        + " from oldConfig=" + Configuration.resourceQualifierString(oldConfig)
-                        + " to newConfig="
-                        + Configuration.resourceQualifierString(activityResources.overrideConfig),
-                        here);
-            }
-
-            final boolean activityHasOverrideConfig =
-                    !activityResources.overrideConfig.equals(Configuration.EMPTY);
-
-            // Rebase each Resources associated with this Activity.
-            final int refCount = activityResources.activityResources.size();
-            for (int i = 0; i < refCount; i++) {
-                WeakReference<Resources> weakResRef = activityResources.activityResources.get(i);
-                Resources resources = weakResRef.get();
-                if (resources == null) {
-                    continue;
+        try {
+            Trace.traceBegin(Trace.TRACE_TAG_RESOURCES,
+                    "ResourcesManager#updateResourcesForActivity");
+            synchronized (this) {
+                final ActivityResources activityResources =
+                        getOrCreateActivityResourcesStructLocked(activityToken);
+
+                if (Objects.equals(activityResources.overrideConfig, overrideConfig)) {
+                    // They are the same, no work to do.
+                    return;
                 }
 
-                // Extract the ResourcesKey that was last used to create the Resources for this
-                // activity.
-                final ResourcesKey oldKey = findKeyForResourceImplLocked(resources.getImpl());
-                if (oldKey == null) {
-                    Slog.e(TAG, "can't find ResourcesKey for resources impl="
-                            + resources.getImpl());
-                    continue;
-                }
+                // Grab a copy of the old configuration so we can create the delta's of each
+                // Resources object associated with this Activity.
+                final Configuration oldConfig = new Configuration(activityResources.overrideConfig);
 
-                // Build the new override configuration for this ResourcesKey.
-                final Configuration rebasedOverrideConfig = new Configuration();
+                // Update the Activity's base override.
                 if (overrideConfig != null) {
-                    rebasedOverrideConfig.setTo(overrideConfig);
+                    activityResources.overrideConfig.setTo(overrideConfig);
+                } else {
+                    activityResources.overrideConfig.setToDefaults();
                 }
 
-                if (activityHasOverrideConfig && oldKey.hasOverrideConfiguration()) {
-                    // Generate a delta between the old base Activity override configuration and
-                    // the actual final override configuration that was used to figure out the real
-                    // delta this Resources object wanted.
-                    Configuration overrideOverrideConfig = Configuration.generateDelta(
-                            oldConfig, oldKey.mOverrideConfiguration);
-                    rebasedOverrideConfig.updateFrom(overrideOverrideConfig);
+                if (DEBUG) {
+                    Throwable here = new Throwable();
+                    here.fillInStackTrace();
+                    Slog.d(TAG, "updating resources override for activity=" + activityToken
+                            + " from oldConfig="
+                            + Configuration.resourceQualifierString(oldConfig)
+                            + " to newConfig="
+                            + Configuration.resourceQualifierString(
+                            activityResources.overrideConfig),
+                            here);
                 }
 
-                // Create the new ResourcesKey with the rebased override config.
-                final ResourcesKey newKey = new ResourcesKey(oldKey.mResDir, oldKey.mSplitResDirs,
-                        oldKey.mOverlayDirs, oldKey.mLibDirs, oldKey.mDisplayId,
-                        rebasedOverrideConfig, oldKey.mCompatInfo);
+                final boolean activityHasOverrideConfig =
+                        !activityResources.overrideConfig.equals(Configuration.EMPTY);
+
+                // Rebase each Resources associated with this Activity.
+                final int refCount = activityResources.activityResources.size();
+                for (int i = 0; i < refCount; i++) {
+                    WeakReference<Resources> weakResRef = activityResources.activityResources.get(
+                            i);
+                    Resources resources = weakResRef.get();
+                    if (resources == null) {
+                        continue;
+                    }
 
-                if (DEBUG) {
-                    Slog.d(TAG, "rebasing ref=" + resources + " from oldKey=" + oldKey
-                            + " to newKey=" + newKey);
-                }
+                    // Extract the ResourcesKey that was last used to create the Resources for this
+                    // activity.
+                    final ResourcesKey oldKey = findKeyForResourceImplLocked(resources.getImpl());
+                    if (oldKey == null) {
+                        Slog.e(TAG, "can't find ResourcesKey for resources impl="
+                                + resources.getImpl());
+                        continue;
+                    }
 
-                ResourcesImpl resourcesImpl = findResourcesImplForKeyLocked(newKey);
-                if (resourcesImpl == null) {
-                    resourcesImpl = createResourcesImpl(newKey);
-                    mResourceImpls.put(newKey, new WeakReference<>(resourcesImpl));
-                }
+                    // Build the new override configuration for this ResourcesKey.
+                    final Configuration rebasedOverrideConfig = new Configuration();
+                    if (overrideConfig != null) {
+                        rebasedOverrideConfig.setTo(overrideConfig);
+                    }
+
+                    if (activityHasOverrideConfig && oldKey.hasOverrideConfiguration()) {
+                        // Generate a delta between the old base Activity override configuration and
+                        // the actual final override configuration that was used to figure out the
+                        // real delta this Resources object wanted.
+                        Configuration overrideOverrideConfig = Configuration.generateDelta(
+                                oldConfig, oldKey.mOverrideConfiguration);
+                        rebasedOverrideConfig.updateFrom(overrideOverrideConfig);
+                    }
+
+                    // Create the new ResourcesKey with the rebased override config.
+                    final ResourcesKey newKey = new ResourcesKey(oldKey.mResDir,
+                            oldKey.mSplitResDirs,
+                            oldKey.mOverlayDirs, oldKey.mLibDirs, oldKey.mDisplayId,
+                            rebasedOverrideConfig, oldKey.mCompatInfo);
+
+                    if (DEBUG) {
+                        Slog.d(TAG, "rebasing ref=" + resources + " from oldKey=" + oldKey
+                                + " to newKey=" + newKey);
+                    }
 
-                if (resourcesImpl != resources.getImpl()) {
-                    // Set the ResourcesImpl, updating it for all users of this Resources object.
-                    resources.setImpl(resourcesImpl);
+                    ResourcesImpl resourcesImpl = findResourcesImplForKeyLocked(newKey);
+                    if (resourcesImpl == null) {
+                        resourcesImpl = createResourcesImpl(newKey);
+                        mResourceImpls.put(newKey, new WeakReference<>(resourcesImpl));
+                    }
+
+                    if (resourcesImpl != resources.getImpl()) {
+                        // Set the ResourcesImpl, updating it for all users of this Resources
+                        // object.
+                        resources.setImpl(resourcesImpl);
+                    }
                 }
             }
+        } finally {
+            Trace.traceEnd(Trace.TRACE_TAG_RESOURCES);
         }
     }
 
@@ -745,86 +770,95 @@ public class ResourcesManager {
 
     public final boolean applyConfigurationToResourcesLocked(@NonNull Configuration config,
                                                              @Nullable CompatibilityInfo compat) {
-        if (!mResConfiguration.isOtherSeqNewer(config) && compat == null) {
-            if (DEBUG || DEBUG_CONFIGURATION) Slog.v(TAG, "Skipping new config: curSeq="
-                    + mResConfiguration.seq + ", newSeq=" + config.seq);
-            return false;
-        }
-        int changes = mResConfiguration.updateFrom(config);
-        // Things might have changed in display manager, so clear the cached displays.
-        mDisplays.clear();
-        DisplayMetrics defaultDisplayMetrics = getDisplayMetrics();
-
-        if (compat != null && (mResCompatibilityInfo == null ||
-                !mResCompatibilityInfo.equals(compat))) {
-            mResCompatibilityInfo = compat;
-            changes |= ActivityInfo.CONFIG_SCREEN_LAYOUT
-                    | ActivityInfo.CONFIG_SCREEN_SIZE
-                    | ActivityInfo.CONFIG_SMALLEST_SCREEN_SIZE;
-        }
+        try {
+            Trace.traceBegin(Trace.TRACE_TAG_RESOURCES,
+                    "ResourcesManager#applyConfigurationToResourcesLocked");
+
+            if (!mResConfiguration.isOtherSeqNewer(config) && compat == null) {
+                if (DEBUG || DEBUG_CONFIGURATION) Slog.v(TAG, "Skipping new config: curSeq="
+                        + mResConfiguration.seq + ", newSeq=" + config.seq);
+                return false;
+            }
+            int changes = mResConfiguration.updateFrom(config);
+            // Things might have changed in display manager, so clear the cached displays.
+            mDisplays.clear();
+            DisplayMetrics defaultDisplayMetrics = getDisplayMetrics();
+
+            if (compat != null && (mResCompatibilityInfo == null ||
+                    !mResCompatibilityInfo.equals(compat))) {
+                mResCompatibilityInfo = compat;
+                changes |= ActivityInfo.CONFIG_SCREEN_LAYOUT
+                        | ActivityInfo.CONFIG_SCREEN_SIZE
+                        | ActivityInfo.CONFIG_SMALLEST_SCREEN_SIZE;
+            }
 
-        Configuration localeAdjustedConfig = config;
-        final LocaleList configLocales = config.getLocales();
-        if (!configLocales.isEmpty()) {
-            setDefaultLocalesLocked(configLocales);
-            final LocaleList adjustedLocales = LocaleList.getAdjustedDefault();
-            if (adjustedLocales != configLocales) { // has the same result as .equals() in this case
-                // The first locale in the list was not chosen. So we create a modified
-                // configuration with the adjusted locales (which moves the chosen locale to the
-                // front).
-                localeAdjustedConfig = new Configuration();
-                localeAdjustedConfig.setTo(config);
-                localeAdjustedConfig.setLocales(adjustedLocales);
-                // Also adjust the locale list in mResConfiguration, so that the Resources created
-                // later would have the same locale list.
-                if (!mResConfiguration.getLocales().equals(adjustedLocales)) {
-                    mResConfiguration.setLocales(adjustedLocales);
-                    changes |= ActivityInfo.CONFIG_LOCALE;
+            Configuration localeAdjustedConfig = config;
+            final LocaleList configLocales = config.getLocales();
+            if (!configLocales.isEmpty()) {
+                setDefaultLocalesLocked(configLocales);
+                final LocaleList adjustedLocales = LocaleList.getAdjustedDefault();
+                if (adjustedLocales
+                        != configLocales) { // has the same result as .equals() in this case
+                    // The first locale in the list was not chosen. So we create a modified
+                    // configuration with the adjusted locales (which moves the chosen locale to the
+                    // front).
+                    localeAdjustedConfig = new Configuration();
+                    localeAdjustedConfig.setTo(config);
+                    localeAdjustedConfig.setLocales(adjustedLocales);
+                    // Also adjust the locale list in mResConfiguration, so that the Resources
+                    // created later would have the same locale list.
+                    if (!mResConfiguration.getLocales().equals(adjustedLocales)) {
+                        mResConfiguration.setLocales(adjustedLocales);
+                        changes |= ActivityInfo.CONFIG_LOCALE;
+                    }
                 }
             }
-        }
 
-        Resources.updateSystemConfiguration(localeAdjustedConfig, defaultDisplayMetrics, compat);
-
-        ApplicationPackageManager.configurationChanged();
-        //Slog.i(TAG, "Configuration changed in " + currentPackageName());
-
-        Configuration tmpConfig = null;
-
-        for (int i = mResourceImpls.size() - 1; i >= 0; i--) {
-            ResourcesKey key = mResourceImpls.keyAt(i);
-            ResourcesImpl r = mResourceImpls.valueAt(i).get();
-            if (r != null) {
-                if (DEBUG || DEBUG_CONFIGURATION) Slog.v(TAG, "Changing resources "
-                        + r + " config to: " + localeAdjustedConfig);
-                int displayId = key.mDisplayId;
-                boolean isDefaultDisplay = (displayId == Display.DEFAULT_DISPLAY);
-                DisplayMetrics dm = defaultDisplayMetrics;
-                final boolean hasOverrideConfiguration = key.hasOverrideConfiguration();
-                if (!isDefaultDisplay || hasOverrideConfiguration) {
-                    if (tmpConfig == null) {
-                        tmpConfig = new Configuration();
-                    }
-                    tmpConfig.setTo(localeAdjustedConfig);
-                    if (!isDefaultDisplay) {
-                        dm = getDisplayMetrics(displayId);
-                        applyNonDefaultDisplayMetricsToConfiguration(dm, tmpConfig);
-                    }
-                    if (hasOverrideConfiguration) {
-                        tmpConfig.updateFrom(key.mOverrideConfiguration);
+            Resources.updateSystemConfiguration(localeAdjustedConfig, defaultDisplayMetrics,
+                    compat);
+
+            ApplicationPackageManager.configurationChanged();
+            //Slog.i(TAG, "Configuration changed in " + currentPackageName());
+
+            Configuration tmpConfig = null;
+
+            for (int i = mResourceImpls.size() - 1; i >= 0; i--) {
+                ResourcesKey key = mResourceImpls.keyAt(i);
+                ResourcesImpl r = mResourceImpls.valueAt(i).get();
+                if (r != null) {
+                    if (DEBUG || DEBUG_CONFIGURATION) Slog.v(TAG, "Changing resources "
+                            + r + " config to: " + localeAdjustedConfig);
+                    int displayId = key.mDisplayId;
+                    boolean isDefaultDisplay = (displayId == Display.DEFAULT_DISPLAY);
+                    DisplayMetrics dm = defaultDisplayMetrics;
+                    final boolean hasOverrideConfiguration = key.hasOverrideConfiguration();
+                    if (!isDefaultDisplay || hasOverrideConfiguration) {
+                        if (tmpConfig == null) {
+                            tmpConfig = new Configuration();
+                        }
+                        tmpConfig.setTo(localeAdjustedConfig);
+                        if (!isDefaultDisplay) {
+                            dm = getDisplayMetrics(displayId);
+                            applyNonDefaultDisplayMetricsToConfiguration(dm, tmpConfig);
+                        }
+                        if (hasOverrideConfiguration) {
+                            tmpConfig.updateFrom(key.mOverrideConfiguration);
+                        }
+                        r.updateConfiguration(tmpConfig, dm, compat);
+                    } else {
+                        r.updateConfiguration(localeAdjustedConfig, dm, compat);
                     }
-                    r.updateConfiguration(tmpConfig, dm, compat);
+                    //Slog.i(TAG, "Updated app resources " + v.getKey()
+                    //        + " " + r + ": " + r.getConfiguration());
                 } else {
-                    r.updateConfiguration(localeAdjustedConfig, dm, compat);
+                    //Slog.i(TAG, "Removing old resources " + v.getKey());
+                    mResourceImpls.removeAt(i);
                 }
-                //Slog.i(TAG, "Updated app resources " + v.getKey()
-                //        + " " + r + ": " + r.getConfiguration());
-            } else {
-                //Slog.i(TAG, "Removing old resources " + v.getKey());
-                mResourceImpls.removeAt(i);
             }
-        }
 
-        return changes != 0;
+            return changes != 0;
+        } finally {
+            Trace.traceEnd(Trace.TRACE_TAG_RESOURCES);
+        }
     }
 }
diff --git a/libs/androidfw/AssetManager.cpp b/libs/androidfw/AssetManager.cpp
index 6913f43a87c3..715c875d064d 100644
--- a/libs/androidfw/AssetManager.cpp
+++ b/libs/androidfw/AssetManager.cpp
@@ -34,9 +34,7 @@
 #include <utils/String8.h>
 #include <utils/threads.h>
 #include <utils/Timers.h>
-#ifdef __ANDROID__
-#include <cutils/trace.h>
-#endif
+#include <utils/Trace.h>
 
 #include <assert.h>
 #include <dirent.h>
@@ -54,14 +52,6 @@
     _rc; })
 #endif
 
-#ifdef __ANDROID__
-#define MY_TRACE_BEGIN(x) ATRACE_BEGIN(x)
-#define MY_TRACE_END() ATRACE_END()
-#else
-#define MY_TRACE_BEGIN(x)
-#define MY_TRACE_END()
-#endif
-
 using namespace android;
 
 static const bool kIsDebug = false;
@@ -623,7 +613,7 @@ bool AssetManager::appendPathToResTable(const asset_path& ap, bool appAsLib) con
     ResTable* sharedRes = NULL;
     bool shared = true;
     bool onlyEmptyResources = true;
-    MY_TRACE_BEGIN(ap.path.string());
+    ATRACE_NAME(ap.path.string());
     Asset* idmap = openIdmapLocked(ap);
     size_t nextEntryIdx = mResources->getTableCount();
     ALOGV("Looking for resource asset in '%s'\n", ap.path.string());
@@ -703,8 +693,6 @@ bool AssetManager::appendPathToResTable(const asset_path& ap, bool appAsLib) con
     if (idmap != NULL) {
         delete idmap;
     }
-    MY_TRACE_END();
-
     return onlyEmptyResources;
 }
 
@@ -752,6 +740,7 @@ const ResTable* AssetManager::getResTable(bool required) const
 
 void AssetManager::updateResourceParamsLocked() const
 {
+    ATRACE_CALL();
     ResTable* res = mResources;
     if (!res) {
         return;
diff --git a/libs/androidfw/ResourceTypes.cpp b/libs/androidfw/ResourceTypes.cpp
index 1ccc59a6a348..15cb684ee08e 100644
--- a/libs/androidfw/ResourceTypes.cpp
+++ b/libs/androidfw/ResourceTypes.cpp
@@ -24,6 +24,7 @@
 #include <stdlib.h>
 #include <string.h>
 
+#include <algorithm>
 #include <limits>
 #include <memory>
 #include <type_traits>
@@ -5810,6 +5811,10 @@ const DynamicRefTable* ResTable::getDynamicRefTableForCookie(int32_t cookie) con
     return NULL;
 }
 
+static bool compareResTableConfig(const ResTable_config& a, const ResTable_config& b) {
+    return a.compare(b) < 0;
+}
+
 void ResTable::getConfigurations(Vector<ResTable_config>* configs, bool ignoreMipmap,
         bool ignoreAndroidPackage, bool includeSystemConfigs) const {
     const size_t packageCount = mPackageGroups.size();
@@ -5840,17 +5845,11 @@ void ResTable::getConfigurations(Vector<ResTable_config>* configs, bool ignoreMi
                     ResTable_config cfg;
                     memset(&cfg, 0, sizeof(ResTable_config));
                     cfg.copyFromDtoH(config->config);
-                    // only insert unique
-                    const size_t N = configs->size();
-                    size_t n;
-                    for (n = 0; n < N; n++) {
-                        if (0 == (*configs)[n].compare(cfg)) {
-                            break;
-                        }
-                    }
-                    // if we didn't find it
-                    if (n == N) {
-                        configs->add(cfg);
+
+                    auto iter = std::lower_bound(configs->begin(), configs->end(), cfg,
+                                                 compareResTableConfig);
+                    if (iter == configs->end() || iter->compare(cfg) != 0) {
+                        configs->insertAt(cfg, std::distance(configs->begin(), iter));
                     }
                 }
             }
@@ -5858,6 +5857,10 @@ void ResTable::getConfigurations(Vector<ResTable_config>* configs, bool ignoreMi
     }
 }
 
+static bool compareString8AndCString(const String8& str, const char* cStr) {
+    return strcmp(str.string(), cStr) < 0;
+}
+
 void ResTable::getLocales(Vector<String8>* locales, bool includeSystemLocales) const
 {
     Vector<ResTable_config> configs;
@@ -5872,15 +5875,11 @@ void ResTable::getLocales(Vector<String8>* locales, bool includeSystemLocales) c
     char locale[RESTABLE_MAX_LOCALE_LEN];
     for (size_t i=0; i<I; i++) {
         configs[i].getBcp47Locale(locale);
-        const size_t J = locales->size();
-        size_t j;
-        for (j=0; j<J; j++) {
-            if (0 == strcmp(locale, (*locales)[j].string())) {
-                break;
-            }
-        }
-        if (j == J) {
-            locales->add(String8(locale));
+
+        auto iter = std::lower_bound(locales->begin(), locales->end(), locale,
+                                     compareString8AndCString);
+        if (iter == locales->end() || strcmp(iter->string(), locale) != 0) {
+            locales->insertAt(String8(locale), std::distance(locales->begin(), iter));
         }
     }
 }
diff --git a/libs/androidfw/tests/ResTable_test.cpp b/libs/androidfw/tests/ResTable_test.cpp
index 7cd7fb5cd711..b8b46259f0d1 100644
--- a/libs/androidfw/tests/ResTable_test.cpp
+++ b/libs/androidfw/tests/ResTable_test.cpp
@@ -39,8 +39,20 @@ namespace {
  */
 #include "data/basic/basic_arsc.h"
 
+/**
+ * Include a binary library resource table.
+ *
+ * Package: com.android.test.basic
+ */
 #include "data/lib/lib_arsc.h"
 
+/**
+ * Include a system resource table.
+ *
+ * Package: android
+ */
+#include "data/system/system_arsc.h"
+
 TEST(ResTableTest, shouldLoadSuccessfully) {
     ResTable table;
     ASSERT_EQ(NO_ERROR, table.add(basic_arsc, basic_arsc_len));
@@ -324,4 +336,25 @@ TEST(ResTableTest, ShareButDontModifyResTable) {
     ASSERT_EQ(uint32_t(600), val.data);
 }
 
+TEST(ResTableTest, GetConfigurationsReturnsUniqueList) {
+    ResTable table;
+    ASSERT_EQ(NO_ERROR, table.add(system_arsc, system_arsc_len));
+    ASSERT_EQ(NO_ERROR, table.add(basic_arsc, basic_arsc_len));
+
+    ResTable_config configSv;
+    memset(&configSv, 0, sizeof(configSv));
+    configSv.language[0] = 's';
+    configSv.language[1] = 'v';
+
+    Vector<ResTable_config> configs;
+    table.getConfigurations(&configs);
+
+    EXPECT_EQ(1, std::count(configs.begin(), configs.end(), configSv));
+
+    Vector<String8> locales;
+    table.getLocales(&locales);
+
+    EXPECT_EQ(1, std::count(locales.begin(), locales.end(), String8("sv")));
+}
+
 } // namespace
diff --git a/libs/androidfw/tests/TestHelpers.h b/libs/androidfw/tests/TestHelpers.h
index ac80d8868090..ff9be164dbb0 100644
--- a/libs/androidfw/tests/TestHelpers.h
+++ b/libs/androidfw/tests/TestHelpers.h
@@ -21,7 +21,7 @@ namespace android {
 enum { MAY_NOT_BE_BAG = false };
 
 static inline bool operator==(const android::ResTable_config& a, const android::ResTable_config& b) {
-    return memcmp(&a, &b, sizeof(a)) == 0;
+    return a.compare(b) == 0;
 }
 
 static inline ::std::ostream& operator<<(::std::ostream& out, const android::ResTable_config& c) {
diff --git a/libs/androidfw/tests/data/system/R.h b/libs/androidfw/tests/data/system/R.h
index 27f25fec0d01..6a31fb8ff088 100644
--- a/libs/androidfw/tests/data/system/R.h
+++ b/libs/androidfw/tests/data/system/R.h
@@ -33,6 +33,12 @@ namespace style {
     };
 }
 
+namespace integer {
+    enum {
+        number = 0x01030000, // sv
+    };
+}
+
 } // namespace R
 } // namespace android
 
diff --git a/libs/androidfw/tests/data/system/res/values-sv/values.xml b/libs/androidfw/tests/data/system/res/values-sv/values.xml
new file mode 100644
index 000000000000..b97bdb68aca7
--- /dev/null
+++ b/libs/androidfw/tests/data/system/res/values-sv/values.xml
@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2016 The Android Open Source Project
+
+     Licensed under the Apache License, Version 2.0 (the "License");
+     you may not use this file except in compliance with the License.
+     You may obtain a copy of the License at
+
+          http://www.apache.org/licenses/LICENSE-2.0
+
+     Unless required by applicable law or agreed to in writing, software
+     distributed under the License is distributed on an "AS IS" BASIS,
+     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+     See the License for the specific language governing permissions and
+     limitations under the License.
+-->
+
+<resources>
+    <public type="integer" name="number" id="0x01030000" />
+    <integer name="number">1</integer>
+</resources>
diff --git a/libs/androidfw/tests/data/system/system_arsc.h b/libs/androidfw/tests/data/system/system_arsc.h
index 215ecae552c5..b0dab6b357e9 100644
--- a/libs/androidfw/tests/data/system/system_arsc.h
+++ b/libs/androidfw/tests/data/system/system_arsc.h
@@ -1,8 +1,8 @@
 unsigned char system_arsc[] = {
-  0x02, 0x00, 0x0c, 0x00, 0x18, 0x03, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
+  0x02, 0x00, 0x0c, 0x00, 0xf8, 0x03, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
   0x01, 0x00, 0x1c, 0x00, 0x1c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x1c, 0x00, 0x00, 0x00,
-  0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x20, 0x01, 0xf0, 0x02, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x20, 0x01, 0xd0, 0x03, 0x00, 0x00,
   0x01, 0x00, 0x00, 0x00, 0x61, 0x00, 0x6e, 0x00, 0x64, 0x00, 0x72, 0x00,
   0x6f, 0x00, 0x69, 0x00, 0x64, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
@@ -25,26 +25,33 @@ unsigned char system_arsc[] = {
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x20, 0x01, 0x00, 0x00,
-  0x02, 0x00, 0x00, 0x00, 0x60, 0x01, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00,
-  0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x1c, 0x00, 0x40, 0x00, 0x00, 0x00,
-  0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-  0x24, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-  0x0c, 0x00, 0x00, 0x00, 0x04, 0x00, 0x61, 0x00, 0x74, 0x00, 0x74, 0x00,
-  0x72, 0x00, 0x00, 0x00, 0x05, 0x00, 0x73, 0x00, 0x74, 0x00, 0x79, 0x00,
-  0x6c, 0x00, 0x65, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x1c, 0x00,
-  0x70, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-  0x00, 0x00, 0x00, 0x00, 0x28, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-  0x00, 0x00, 0x00, 0x00, 0x18, 0x00, 0x00, 0x00, 0x30, 0x00, 0x00, 0x00,
+  0x04, 0x00, 0x00, 0x00, 0x98, 0x01, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x1c, 0x00, 0x78, 0x00, 0x00, 0x00,
+  0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x2c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x0c, 0x00, 0x00, 0x00, 0x1a, 0x00, 0x00, 0x00, 0x2c, 0x00, 0x00, 0x00,
+  0x04, 0x00, 0x61, 0x00, 0x74, 0x00, 0x74, 0x00, 0x72, 0x00, 0x00, 0x00,
+  0x05, 0x00, 0x73, 0x00, 0x74, 0x00, 0x79, 0x00, 0x6c, 0x00, 0x65, 0x00,
+  0x00, 0x00, 0x07, 0x00, 0x69, 0x00, 0x6e, 0x00, 0x74, 0x00, 0x65, 0x00,
+  0x67, 0x00, 0x65, 0x00, 0x72, 0x00, 0x00, 0x00, 0x0d, 0x00, 0x5e, 0x00,
+  0x61, 0x00, 0x74, 0x00, 0x74, 0x00, 0x72, 0x00, 0x2d, 0x00, 0x70, 0x00,
+  0x72, 0x00, 0x69, 0x00, 0x76, 0x00, 0x61, 0x00, 0x74, 0x00, 0x65, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x1c, 0x00, 0x84, 0x00, 0x00, 0x00,
+  0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x2c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x18, 0x00, 0x00, 0x00, 0x30, 0x00, 0x00, 0x00, 0x46, 0x00, 0x00, 0x00,
   0x0a, 0x00, 0x62, 0x00, 0x61, 0x00, 0x63, 0x00, 0x6b, 0x00, 0x67, 0x00,
   0x72, 0x00, 0x6f, 0x00, 0x75, 0x00, 0x6e, 0x00, 0x64, 0x00, 0x00, 0x00,
   0x0a, 0x00, 0x66, 0x00, 0x6f, 0x00, 0x72, 0x00, 0x65, 0x00, 0x67, 0x00,
   0x72, 0x00, 0x6f, 0x00, 0x75, 0x00, 0x6e, 0x00, 0x64, 0x00, 0x00, 0x00,
   0x09, 0x00, 0x54, 0x00, 0x68, 0x00, 0x65, 0x00, 0x6d, 0x00, 0x65, 0x00,
-  0x2e, 0x00, 0x4f, 0x00, 0x6e, 0x00, 0x65, 0x00, 0x00, 0x00, 0x00, 0x00,
-  0x02, 0x02, 0x10, 0x00, 0x18, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
-  0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x40, 0x00, 0x00, 0x00, 0x40,
-  0x01, 0x02, 0x44, 0x00, 0x84, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
-  0x02, 0x00, 0x00, 0x00, 0x4c, 0x00, 0x00, 0x00, 0x30, 0x00, 0x00, 0x00,
+  0x2e, 0x00, 0x4f, 0x00, 0x6e, 0x00, 0x65, 0x00, 0x00, 0x00, 0x06, 0x00,
+  0x6e, 0x00, 0x75, 0x00, 0x6d, 0x00, 0x62, 0x00, 0x65, 0x00, 0x72, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x02, 0x02, 0x10, 0x00, 0x18, 0x00, 0x00, 0x00,
+  0x01, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x40,
+  0x00, 0x00, 0x00, 0x40, 0x01, 0x02, 0x4c, 0x00, 0x8c, 0x00, 0x00, 0x00,
+  0x01, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x54, 0x00, 0x00, 0x00,
+  0x38, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
@@ -55,15 +62,27 @@ unsigned char system_arsc[] = {
   0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
   0x00, 0x00, 0x00, 0x01, 0x08, 0x00, 0x00, 0x10, 0x11, 0x00, 0x00, 0x00,
   0x02, 0x02, 0x10, 0x00, 0x14, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00,
-  0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x40, 0x01, 0x02, 0x44, 0x00,
-  0x70, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
-  0x48, 0x00, 0x00, 0x00, 0x30, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x40, 0x01, 0x02, 0x4c, 0x00,
+  0x78, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
+  0x50, 0x00, 0x00, 0x00, 0x38, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00, 0x03, 0x00,
-  0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00,
-  0x00, 0x00, 0x01, 0x01, 0x08, 0x00, 0x00, 0x1d, 0x00, 0x00, 0xff, 0xff,
-  0x01, 0x00, 0x01, 0x01, 0x08, 0x00, 0x00, 0x1d, 0x00, 0x00, 0x00, 0xff
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x10, 0x00, 0x03, 0x00, 0x02, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x01,
+  0x08, 0x00, 0x00, 0x1d, 0x00, 0x00, 0xff, 0xff, 0x01, 0x00, 0x01, 0x01,
+  0x08, 0x00, 0x00, 0x1d, 0x00, 0x00, 0x00, 0xff, 0x02, 0x02, 0x10, 0x00,
+  0x14, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x40, 0x01, 0x02, 0x4c, 0x00, 0x60, 0x00, 0x00, 0x00,
+  0x03, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x50, 0x00, 0x00, 0x00,
+  0x38, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x73, 0x76, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x08, 0x00, 0x02, 0x00, 0x03, 0x00, 0x00, 0x00, 0x08, 0x00, 0x00, 0x10,
+  0x01, 0x00, 0x00, 0x00, 0x02, 0x02, 0x10, 0x00, 0x10, 0x00, 0x00, 0x00,
+  0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
 };
-unsigned int system_arsc_len = 792;
+unsigned int system_arsc_len = 1016;