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Commit 7114f3bf authored by Shimeng (Simon) Wang's avatar Shimeng (Simon) Wang
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Fine tune the high memory threshold and usage delta for v8 GC. 

This will help reduce a bit more v8 GC for heavy web sites.

issue: 3317574
Change-Id: I5f93f9311fc864fb13933f92ff402e00c0e6fcdf
parent 3115dad3

core/java/android/webkit/WebViewCore.java

+2 −7
Original line number Diff line number Diff line
@@ -188,14 +188,9 @@ final class WebViewCore { 
        // Allow us to use up to our memory class value before V8's GC kicks in.

        // These values have been determined by experimentation.

        mLowMemoryUsageThresholdMb = manager.getLargeMemoryClass();

        // If things get crazy, allow V8 to use up to 3 times our memory class, or a third of the

        // device's total available memory, whichever is smaller.  This value must be no less

        // than the low memory threshold.

        // At that point V8 will start attempting more aggressive garbage collection.

        mHighMemoryUsageThresholdMb = Math.max(Math.min(mLowMemoryUsageThresholdMb * 3,

                (int) (memInfo.availMem / 3) >> 20), mLowMemoryUsageThresholdMb);

        mHighMemoryUsageThresholdMb = (int) (mLowMemoryUsageThresholdMb * 1.5);

        // Avoid constant V8 GC when memory usage equals to working set estimate.

        mHighUsageDeltaMb = 1;

        mHighUsageDeltaMb = mLowMemoryUsageThresholdMb / 32;



        // Send a message to initialize the WebViewCore.

        Message init = sWebCoreHandler.obtainMessage(