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8703134a23
In a few cases the $.each was doing something imperatively that was terser and easier to understand by using a different Underscore method, so a few of these I rewrote. Some code was using the fact that jQuery sets `this` in the callback to be the item; I rewrote those to use an explicit parameter. Some code was using $(some selector).each(callback). I converted these to _.each($(some selector), callback). One function, ui.process_condensing, was written to be a jQuery $.each callback despite being in a totally different module from code using it. I noticed this and updated the function's args. (imported from commit bf5922a35f257c168cc09ec1d077415d6ef19a03)
102 lines
2.7 KiB
JavaScript
102 lines
2.7 KiB
JavaScript
/* WARNING:
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This file is only included when Django's DEBUG = True and your
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host is in INTERNAL_IPS.
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Do not commit any code elsewhere which uses these functions.
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They are for debugging use only.
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The file may still be accessible under other circumstances, so do
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not put sensitive information here. */
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// It's fine to use console.log etc. in this file.
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/*jslint devel: true */
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/*
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print_elapsed_time("foo", foo)
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evaluates to foo() and prints the elapsed time
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to the console along with the name "foo". */
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function print_elapsed_time(name, fun) {
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var t0 = new Date().getTime();
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var out = fun();
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var t1 = new Date().getTime();
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console.log(name + ': ' + (t1 - t0) + ' ms');
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return out;
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}
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/* An IterationProfiler is used for profiling parts of looping
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* constructs (like a for loop or _.each). You mark sections of the
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* iteration body and the IterationProfiler will sum the costs of those
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* sections over all iterations.
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*
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* Example:
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*
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* var ip = new IterationProfiler();
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* _.each(myarray, function (elem) {
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* ip.iteration_start();
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*
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* cheap_op(elem);
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* ip.section("a");
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* expensive_op(elem);
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* ip.section("b");
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* another_expensive_op(elem);
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*
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* ip.iteration_stop();
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* });
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* ip.done();
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*
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* The console output will look something like:
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* _iteration_overhead 0.8950002520577982
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* _rest_of_iteration 153.415000159293413
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* a 2.361999897402711
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* b 132.625999901327305
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*
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* The _rest_of_iteration section is the region of the iteration body
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* after section b.
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*/
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function IterationProfiler() {
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this.sections = {};
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this.last_time = window.performance.now();
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}
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IterationProfiler.prototype = {
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iteration_start: function () {
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this.section('_iteration_overhead');
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},
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iteration_stop: function () {
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var now = window.performance.now();
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var diff = now - this.last_time;
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if (diff > 1) {
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if (this.sections._rest_of_iteration === undefined) {
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this.sections._rest_of_iteration = 0;
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}
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this.sections._rest_of_iteration += diff;
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}
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this.last_time = now;
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},
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section: function (label) {
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var now = window.performance.now();
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if (this.sections[label] === undefined) {
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this.sections[label] = 0;
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}
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this.sections[label] += (now - this.last_time);
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this.last_time = now;
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},
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done: function () {
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this.section('_iteration_overhead');
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var prop;
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for (prop in this.sections) {
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if (this.sections.hasOwnProperty(prop)) {
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console.log(prop, this.sections[prop]);
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}
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}
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}
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};
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