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Run results for:
set includes vs array includes for two values
Check whether Set look ups are faster than Array includes even when there's only two values
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<iframe src="https://measurethat.net/Embed?id=568375" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:132.0) Gecko/20100101 Firefox/132.0
Browser:
Firefox 132
Operating system:
Windows
Device Platform:
Desktop
Date tested:
one year ago
Test name
Executions per second
array (first case)
4.8 Ops/sec
array (second case)
4.5 Ops/sec
Set (first case)
97.5 Ops/sec
Set (second case)
100.0 Ops/sec
Set (no case)
3.5 Ops/sec
array (no case)
77.5 Ops/sec
Script Preparation code:
var valueArray = [1, 2]; var valueSet = new Set([1, 2]);
Tests:
array (first case)
for (var i = 0; i < 1e7; ++i) { valueArray.includes(1); }
array (second case)
for (var i = 0; i < 1e7; ++i) { valueArray.includes(2); }
Set (first case)
for (var i = 0; i < 1e7; ++i) { valueSet.has(1); }
Set (second case)
for (var i = 0; i < 1e7; ++i) { valueSet.has(2); }
Set (no case)
for (var i = 0; i < 1e7; ++i) { valueArray.includes(3); }
array (no case)
for (var i = 0; i < 1e7; ++i) { valueSet.has(3); }