mirror of
https://github.com/facebook/react-native.git
synced 2025-11-01 09:14:26 +00:00
Ruslan Shestopalyuk
09ad0cc0c6
Summary: Pull Request resolved: https://github.com/facebook/react-native/pull/35768 Changelog: [Internal] This implements native side mechanics for reporting user events timing to JS (PerformanceObserver API). See the standard for more details: https://www.w3.org/TR/event-timing/ The events are only logged when there are any active subscriptions (via `PerformanceObserver.observe`), also we only log "discrete events" (i.e. no likes of mouse move), so the overhead is non-existing. There are two main metrics of interest for an event lifecycle: * Time the event is spent in the queue, i.e. the time between it's created and dispatched * Time that is spend in the event handler on the JS side (event dispatch), or processing time Both of these are measured, and the corresponding fields are populated. Reviewed By: sammy-SC Differential Revision: D42294947 fbshipit-source-id: 4fd7938c04b942400befa4057d4929fb2763cee1
76 lines
1.9 KiB
C++
76 lines
1.9 KiB
C++
/*
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* Copyright (c) Meta Platforms, Inc. and affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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#pragma once
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#include <FBReactNativeSpec/FBReactNativeSpecJSI.h>
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#include <functional>
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#include <optional>
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#include <string>
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#include <vector>
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namespace facebook::react {
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class PerformanceEntryReporter;
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#pragma mark - Structs
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using RawPerformanceEntry = NativePerformanceObserverCxxBaseRawPerformanceEntry<
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std::string,
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int32_t,
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double,
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double,
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// For "event" entries only:
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std::optional<double>,
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std::optional<double>,
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std::optional<uint32_t>>;
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template <>
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struct Bridging<RawPerformanceEntry>
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: NativePerformanceObserverCxxBaseRawPerformanceEntryBridging<
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std::string,
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int32_t,
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double,
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double,
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std::optional<double>,
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std::optional<double>,
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std::optional<uint32_t>> {};
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using GetPendingEntriesResult =
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NativePerformanceObserverCxxBaseGetPendingEntriesResult<
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std::vector<RawPerformanceEntry>,
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uint32_t>;
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template <>
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struct Bridging<GetPendingEntriesResult>
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: NativePerformanceObserverCxxBaseGetPendingEntriesResultBridging<
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std::vector<RawPerformanceEntry>,
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uint32_t> {};
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#pragma mark - implementation
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class NativePerformanceObserver
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: public NativePerformanceObserverCxxSpec<NativePerformanceObserver>,
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std::enable_shared_from_this<NativePerformanceObserver> {
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public:
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NativePerformanceObserver(std::shared_ptr<CallInvoker> jsInvoker);
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~NativePerformanceObserver();
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void startReporting(jsi::Runtime &rt, std::string entryType);
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void stopReporting(jsi::Runtime &rt, std::string entryType);
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GetPendingEntriesResult popPendingEntries(jsi::Runtime &rt);
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void setOnPerformanceEntryCallback(
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jsi::Runtime &rt,
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std::optional<AsyncCallback<>> callback);
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private:
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};
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} // namespace facebook::react
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