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Simple Javascript (node.js and browser) timers for benchmarking and other development testing
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// https://nodejs.org/docs/v0.8.0/api/all.html#all_process_hrtime | |
const timeitnode = function (name) { | |
const start = process.hrtime(); | |
return { | |
stop() { | |
const diff = process.hrtime(start); | |
console.log('"%s" took %d seconds and %d nanoseconds', name, diff[0], diff[1]); | |
// return process.hrtime(start); | |
}, | |
}; | |
}; | |
// https://stackoverflow.com/a/25878121/99923 | |
const timeitbrowser = function (name) { | |
const start = new Date(); | |
return { | |
stop() { | |
const end = new Date(); | |
const time = end.getTime() - start.getTime(); | |
console.log('Timer:', name, 'finished in', time, 'ms'); | |
// return time | |
}, | |
}; | |
}; | |
// Caculate many runs when you have lots of workers/callbacks and need to time each one | |
const AverageTimer = () => { | |
const times = []; | |
return { | |
start() { | |
const start = process.hrtime(); | |
// Closure to allow multiple sub-timers to run | |
return { | |
stop() { | |
times.push(process.hrtime(start)); | |
}, | |
}; | |
}, | |
report(name) { | |
const seconds = Math.round(times.reduce((a, b) => a + b[0], 0) / times.length); | |
const nanoseconds = Math.round(times.reduce((a, b) => a + b[1], 0) / times.length); | |
console.log( | |
'"%s" took %d seconds and %d microseconds', | |
name, | |
seconds, | |
Math.round(nanoseconds / 1000 / 1000), | |
); | |
}, | |
}; | |
}; | |
// Caculate average over many runs and display results in milliseconds | |
const AverageTimer = () => { | |
const times = []; | |
return { | |
start() { | |
const start = process.hrtime(); | |
// Closure to allow multiple sub-timers to run | |
return { | |
stop() { | |
times.push(process.hrtime(start)); | |
}, | |
}; | |
}, | |
report(name) { | |
// Add seconds + nanoseconds | |
const total = times.reduce((c, n) => c + (n[0] * 1000) + (n[1] / 1000 / 1000), 0); | |
// Pad string for easy comparison of results | |
const ms = String(` ${Math.round(total / times.length)}`).slice(-10); | |
console.log('TIMER: %s ms (average) for "%s"', ms, name); | |
}, | |
}; | |
}; |
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