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25 lines
745 B
25 lines
745 B
/*
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* Performance.now() polyfill
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*
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* http://www.w3.org/TR/hr-time/#sec-high-resolution-time
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*
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* Dummy implementation which uses the Date built-in and has no higher
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* resolution. If/when Duktape has a built-in high resolution timer
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* interface, reimplement this.
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*/
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var _perfNowZeroTime = Date.now();
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if (typeof Performance === 'undefined') {
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Object.defineProperty(this, 'Performance', {
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value: {},
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writable: true, enumerable: false, configurable: true
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});
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}
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if (typeof Performance.now === 'undefined') {
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Object.defineProperty(Performance, 'now', {
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value: function () {
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return Date.now() - _perfNowZeroTime;
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}, writable: true, enumerable: false, configurable: true
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});
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}
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