1 files changed, 8 insertions, 0 deletions
diff --git a/runtime/runtime.cc b/runtime/runtime.cc
index ebad371d17..280fd511d9 100644
--- a/runtime/runtime.cc
+++ b/runtime/runtime.cc
@@ -3372,6 +3372,14 @@ void Runtime::MadviseFileForRange(size_t madvise_size_limit_bytes,
                                   const uint8_t* map_begin,
                                   const uint8_t* map_end,
                                   const std::string& file_name) {
+  // Short-circuit the madvise optimization for background processes. This
+  // avoids IO and memory contention with foreground processes, particularly
+  // those involving app startup.
+  const Runtime* runtime = Runtime::Current();
+  if (runtime != nullptr && !runtime->InJankPerceptibleProcessState()) {
+    return;
+  }
+
   // Ideal blockTransferSize for madvising files (128KiB)
   static constexpr size_t kIdealIoTransferSizeBytes = 128*1024;