44 lines
1008 B
JavaScript
44 lines
1008 B
JavaScript
/**
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* Copyright (c) 2015-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*
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* @providesModule CPUProfiler
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* @flow
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*/
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'use strict';
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var _label;
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var _nestingLevel = 0;
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var CPUProfiler = {
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start(profileName: string) {
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if (_nestingLevel === 0) {
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if (global.nativeProfilerStart) {
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_label = profileName;
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global.nativeProfilerStart(profileName);
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} else if (console.profile) {
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console.profile(profileName);
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}
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}
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_nestingLevel++;
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},
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end() {
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_nestingLevel--;
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if (_nestingLevel === 0) {
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if (global.nativeProfilerEnd) {
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global.nativeProfilerEnd(_label);
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} else if (console.profileEnd) {
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console.profileEnd();
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}
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_label = undefined;
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}
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}
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};
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module.exports = CPUProfiler;
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