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NodeJS Measure Execution Time
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/** | |
* @param {String} [str] | |
*/ | |
const logTime = (() => { | |
let hrstart, hrend; | |
return str => { | |
if (hrstart === undefined) { | |
hrstart = process.hrtime(); | |
return; | |
} | |
hrend = process.hrtime(hrstart); | |
console.info((str === undefined ? '' : `${str} - `) + '%ds %dms', hrend[0], hrend[1] / 1000000); | |
hrstart = process.hrtime(); | |
}; | |
})(); | |
function test() { | |
// Start timer | |
logTime(); | |
let sum = 0; | |
for (let i = 0; i < 1e6; i++) { | |
sum += Math.random(); | |
} | |
// Ending first timer, also serves as start for next log | |
logTime('Label 1'); | |
sum = 0; | |
for (let i = 0; i < 1e9; i++) { | |
sum += Math.random(); | |
} | |
// Uses `Label 1` timer as start | |
logTime('Label 2'); | |
} | |
test(); // Logs: | |
// | |
// Label 1 - 0s 12.12315ms | |
// Label 2 - 8s 184.500578ms |
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