mirror of
https://github.com/Jermolene/TiddlyWiki5
synced 2024-11-16 06:44:50 +00:00
d402d3c5a6
This is an experimental module to help us measure the performance of the refresh cycle and the filter mechanism. Not intended to replace the performance measurement features in browser developer tools, just to make it easier to automate performance checks cross-browser. The immediate purpose is to help in refactoring the filter mechanism. The recent change to encapsulate the wiki store “tiddlers” object has hurt the performance of filters, and it’s going to be helpful to have decent measurements while refactoring that code. I’m still not convinced that this stuff should be in the core, and may well end up removing it after the present refactoring cycle.
63 lines
1.3 KiB
JavaScript
63 lines
1.3 KiB
JavaScript
/*\
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title: $:/core/modules/utils/performance.js
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type: application/javascript
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module-type: global
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Performance measurement.
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\*/
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(function(){
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/*jslint node: true, browser: true */
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/*global $tw: false */
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"use strict";
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function Performance(enabled) {
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this.enabled = !!enabled;
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this.measures = {}; // Hashmap of current values of measurements
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this.logger = new $tw.utils.Logger("performance");
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}
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/*
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Wrap performance reporting around a top level function
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*/
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Performance.prototype.report = function(name,fn) {
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var self = this;
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if(this.enabled) {
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return function() {
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self.measures = {};
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var startTime = $tw.utils.timer(),
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result = fn.apply(this,arguments);
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self.logger.log(name + ": " + $tw.utils.timer(startTime) + "ms");
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for(var m in self.measures) {
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self.logger.log("+" + m + ": " + self.measures[m] + "ms");
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}
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return result;
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};
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} else {
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return fn;
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}
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};
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/*
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Wrap performance measurements around a subfunction
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*/
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Performance.prototype.measure = function(name,fn) {
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var self = this;
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if(this.enabled) {
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return function() {
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var startTime = $tw.utils.timer(),
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result = fn.apply(this,arguments),
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value = self.measures[name] || 0;
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self.measures[name] = value + $tw.utils.timer(startTime);
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return result;
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};
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} else {
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return fn;
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}
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};
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exports.Performance = Performance;
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})();
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