64 lines
1.7 KiB
JavaScript
64 lines
1.7 KiB
JavaScript
/**
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* Copyright (c) 2015-present, Facebook, Inc.
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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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* @providesModule UIManagerStatTracker
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* @flow
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* @format
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*/
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'use strict';
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var UIManager = require('UIManager');
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var installed = false;
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var UIManagerStatTracker = {
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install: function() {
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if (installed) {
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return;
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}
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installed = true;
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var statLogHandle;
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var stats = {};
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function printStats() {
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console.log({UIManagerStatTracker: stats});
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statLogHandle = null;
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}
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function incStat(key: string, increment: number) {
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stats[key] = (stats[key] || 0) + increment;
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if (!statLogHandle) {
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statLogHandle = setImmediate(printStats);
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}
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}
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var createViewOrig = UIManager.createView;
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UIManager.createView = function(tag, className, rootTag, props) {
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incStat('createView', 1);
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incStat('setProp', Object.keys(props || []).length);
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createViewOrig(tag, className, rootTag, props);
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};
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var updateViewOrig = UIManager.updateView;
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UIManager.updateView = function(tag, className, props) {
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incStat('updateView', 1);
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incStat('setProp', Object.keys(props || []).length);
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updateViewOrig(tag, className, props);
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};
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var manageChildrenOrig = UIManager.manageChildren;
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UIManager.manageChildren = function(
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tag,
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moveFrom,
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moveTo,
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addTags,
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addIndices,
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remove,
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) {
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incStat('manageChildren', 1);
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incStat('move', Object.keys(moveFrom || []).length);
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incStat('remove', Object.keys(remove || []).length);
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manageChildrenOrig(tag, moveFrom, moveTo, addTags, addIndices, remove);
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};
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},
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};
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module.exports = UIManagerStatTracker;
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