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Diffstat (limited to 'node_modules/browser-process-hrtime/index.js')
-rw-r--r-- | node_modules/browser-process-hrtime/index.js | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/node_modules/browser-process-hrtime/index.js b/node_modules/browser-process-hrtime/index.js new file mode 100644 index 0000000..7312c2c --- /dev/null +++ b/node_modules/browser-process-hrtime/index.js @@ -0,0 +1,28 @@ +module.exports = process.hrtime || hrtime + +// polyfil for window.performance.now +var performance = global.performance || {} +var performanceNow = + performance.now || + performance.mozNow || + performance.msNow || + performance.oNow || + performance.webkitNow || + function(){ return (new Date()).getTime() } + +// generate timestamp or delta +// see http://nodejs.org/api/process.html#process_process_hrtime +function hrtime(previousTimestamp){ + var clocktime = performanceNow.call(performance)*1e-3 + var seconds = Math.floor(clocktime) + var nanoseconds = Math.floor((clocktime%1)*1e9) + if (previousTimestamp) { + seconds = seconds - previousTimestamp[0] + nanoseconds = nanoseconds - previousTimestamp[1] + if (nanoseconds<0) { + seconds-- + nanoseconds += 1e9 + } + } + return [seconds,nanoseconds] +}
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