hermes-engine - npm Package Compare versions

Comparing version 0.7.1 to 0.7.2

android/include/hermes/Public/GCConfig.h

@@ -36,2 +36,3 @@ /*
   std::string collectionType;
+  std::string cause;
   std::chrono::milliseconds duration;
@@ -38,0 +39,0 @@ std::chrono::milliseconds cpuDuration;

android/include/jsi/decorator.h

@@ -334,8 +334,13 @@ /*
 
-  void collectGarbage() override {
-    plain().instrumentation().collectGarbage();
+  void collectGarbage(std::string cause) override {
+    plain().instrumentation().collectGarbage(std::move(cause));
   }
 
-  void startTrackingHeapObjectStackTraces() override {
-    plain().instrumentation().startTrackingHeapObjectStackTraces();
+  void startTrackingHeapObjectStackTraces(
+      std::function<void(
+          uint64_t,
+          std::chrono::microseconds,
+          std::vector<HeapStatsUpdate>)> callback) override {
+    plain().instrumentation().startTrackingHeapObjectStackTraces(
+        std::move(callback));
   }
@@ -342,0 +347,0 @@

android/include/jsi/instrumentation.h

@@ -10,4 +10,6 @@ /*
 
+#include <chrono>
 #include <iosfwd>
 #include <string>
+#include <tuple>
 #include <unordered_map>
@@ -53,8 +55,23 @@
 
-  /// perform a full garbage collection
-  virtual void collectGarbage() = 0;
+  /// Perform a full garbage collection.
+  /// \param cause The cause of this collection, as it should be reported in
+  ///   logs.
+  virtual void collectGarbage(std::string cause) = 0;
 
+  /// A HeapStatsUpdate is a tuple of the fragment index, the number of objects
+  /// in that fragment, and the number of bytes used by those objects.
+  /// A "fragment" is a view of all objects allocated within a time slice.
+  using HeapStatsUpdate = std::tuple<uint64_t, uint64_t, uint64_t>;
+
   /// Start capturing JS stack-traces for all JS heap allocated objects. These
   /// can be accessed via \c ::createSnapshotToFile().
-  virtual void startTrackingHeapObjectStackTraces() = 0;
+  /// \param fragmentCallback If present, invoke this callback every so often
+  ///   with the most recently seen object ID, and a list of fragments that have
+  ///   been updated. This callback will be invoked on the same thread that the
+  ///   runtime is using.
+  virtual void startTrackingHeapObjectStackTraces(
+      std::function<void(
+          uint64_t lastSeenObjectID,
+          std::chrono::microseconds timestamp,
+          std::vector<HeapStatsUpdate> stats)> fragmentCallback) = 0;
 
@@ -61,0 +78,0 @@ /// Stop capture JS stack-traces for JS heap allocated objects.

package.json

 {
   "name": "hermes-engine",
-  "version": "0.7.1",
+  "version": "0.7.2",
   "private": false,
@@ -5,0 +5,0 @@ "description": "A JavaScript engine optimized for running React Native on Android",

No alert changes

Worsened metrics

Total package byte prevSize

19996759

-5.61%

No dependency changes