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Run results for:
Find the fastest median
Fastest array median
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<iframe src="https://measurethat.net/Embed?id=525757" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/125.0.0.0 Safari/537.36
Browser:
Chrome 125
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
one year ago
Test name
Executions per second
Prev
11.4 Ops/sec
New
11.7 Ops/sec
Tests:
Math.floor
const median = (columnId, leafRows) => { if (!leafRows.length) { return } const values = leafRows if (values.length === 1) { return values[0] } const mid = Math.floor(values.length / 2) const nums = values.sort((a, b) => a - b) return values.length % 2 !== 0 ? nums[mid] : (nums[mid - 1] + nums[mid]) / 2 } median('', [...Array(10_000_000).keys()])
Bitwise ( >> )
const median = (columnId, leafRows) => { if (!leafRows.length) { return } const values = leafRows if (values.length === 1) { return values[0] } let start = 0; let end = values.length; const mid = start + ((end - start) >> 1); const nums = values.sort((a, b) => a - b) return values.length % 2 !== 0 ? nums[mid] : (nums[mid - 1] + nums[mid]) / 2 } median('', [...Array(10_000_000).keys()])
Bitwise (~~)
const median = (columnId, leafRows) => { if (!leafRows.length) { return } const values = leafRows if (values.length === 1) { return values[0] } const mid = ~~(values.length / 2) const nums = values.sort((a, b) => a - b) return values.length % 2 !== 0 ? nums[mid] : (nums[mid - 1] + nums[mid]) / 2 } median('', [...Array(10_000_000).keys()])