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Run results for:
Date.now() vs new Date() vs performance.now() vs delta loop variants.
Calls to core delta time measurement functionality.
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<iframe src="https://measurethat.net/Embed?id=624176" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (X11; Linux x86_64; rv:142.0) Gecko/20100101 Firefox/142.0
Browser:
Firefox 142
Operating system:
Linux
Device Platform:
Desktop
Date tested:
3 months ago
Test name
Executions per second
Date.now()
14839340.0 Ops/sec
new Date()
8746447.0 Ops/sec
performance.now()
5491177.0 Ops/sec
Date.now() delta loop
34.8 Ops/sec
new Date.now() delta loop
7.8 Ops/sec
performance.now() delta loop
8.6 Ops/sec
Script Preparation code:
const HIGHLY_RANDOM = 436934 const fatslab = new Uint8Array()
Tests:
Date.now()
Date.now()
new Date()
new Date()
performance.now()
performance.now()
Date.now() delta loop
const start = Date.now() for (let i = 0; i < HIGHLY_RANDOM; i += 1) { fatslab[i % 256] = Date.now() - start } const end = Date.now() - start
new Date.now() delta loop
const start = new Date for (let i = 0; i < HIGHLY_RANDOM; i += 1) { fatslab[i % 256] = new Date - start } const end = new Date - start
performance.now() delta loop
const start = performance.now() for (let i = 0; i < HIGHLY_RANDOM; i += 1) { fatslab[i % 256] = performance.now() - start } const end = performance.now() - start