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https://github.com/facebook/react-native.git
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David VaccaandFacebook Github Bot
7f27888878
Summary: This diff adds performance loggers for Fabric in Android to be able to compare current version or RN with Fabric This is the summary of Points and Annotations: - **UIManager_CommitStart**: time that React starts the commit (react tree is ready to start rendering in native) - **UIManager_LayoutTime**: this is the time it takes to calculate layout in yoga - **UIManager_FabricFinishTransactionTime**: Time it takes transform "C++ mutationInstructions" into "Java MountItems" and cross boundaries from C++ to Java (including serialization of data) (THIS IS ONLY FABRIC) - **UIManager_DispatchViewUpdates**: time right before RN moves the mount operations to the Queue that is going to be processed in the next tick UI thread - **UIManager_BatchRunStart**: time right before the mountItems are going to be process in the UI Thread - **UIManager_BatchedExecutionTime**: time it took to run batched mountItems (usually layout and prop updates on views) - **UIManager_NonBatchedExecutionTime**: time it took to run non-batched mountItems (usually creation of views) Reviewed By: fkgozali Differential Revision: D13838337 fbshipit-source-id: 0a707619829e7d95ce94d9305ff434d1224afc46
31 lines
1.0 KiB
C++
31 lines
1.0 KiB
C++
// Copyright 2004-present Facebook. All Rights Reserved.
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#pragma once
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namespace facebook {
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namespace react {
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inline static long getTime() {
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#ifdef ANDROID
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static const int64_t NANOSECONDS_IN_SECOND = 1000000000LL;
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static const int64_t NANOSECONDS_IN_MILLISECOND = 1000000LL;
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// Since SystemClock.uptimeMillis() is commonly used for performance
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// measurement in Java and uptimeMillis() internally uses
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// clock_gettime(CLOCK_MONOTONIC), we use the same API here. We need that to
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// make sure we use the same time system on both JS and Java sides. Links to
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// the source code:
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// https://android.googlesource.com/platform/frameworks/native/+/jb-mr1-release/libs/utils/SystemClock.cpp
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// https://android.googlesource.com/platform/system/core/+/master/libutils/Timers.cpp
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struct timespec now;
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clock_gettime(CLOCK_MONOTONIC, &now);
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int64_t nano = now.tv_sec * NANOSECONDS_IN_SECOND + now.tv_nsec;
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return nano / (double)NANOSECONDS_IN_MILLISECOND;
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#else
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return 0l;
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#endif
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}
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} // namespace react
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} // namespace facebook
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