scratch-html5/js/util/Timer.js

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// Copyright (C) 2013 Massachusetts Institute of Technology
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License version 2,
// as published by the Free Software Foundation.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
/*
* Timer for the interpeter and performance testing
* Tim Mickel, July 2011
*/
var Timer = function() {
var trials = [];
var last_trial = 0;
var start_time = 0;
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};
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Timer.prototype.time = function() {
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return Date.now();
};
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Timer.prototype.start = function() {
start_time = this.time();
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};
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Timer.prototype.stop = function() {
end = this.time();
last_trial = end - start_time;
trials.push(last_trial);
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};
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Timer.prototype.count = function() {
return trials.length;
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};
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Timer.prototype.average = function() {
sum = 0;
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for (i = 0; i < this.count(); i++) {
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sum += trials[i];
}
return sum / this.count();
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};
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Timer.prototype.print = function(element) {
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text = "Trial: " + last_trial + "ms" +
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"<br />\nTrials: " + this.count() + ", Avg: " + this.average() + "ms";
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if (element) {
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$(element).html(text);
} else {
console.log(text);
}
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};