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Run results for:
String to number, parseInt, +, or * 1
Which method of casting a string to a number is fastest
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<iframe src="https://measurethat.net/Embed?id=553866" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:130.0) Gecko/20100101 Firefox/130.0
Browser:
Firefox 130
Operating system:
Mac OS X 10.15
Device Platform:
Desktop
Date tested:
one year ago
stringVar * 1
80/s
+stringVar
73/s
parseInt
67/s
View exact numbers
Test name
Executions per second
✓
stringVar * 1
80 Ops/sec
+stringVar
73 Ops/sec
parseInt
67 Ops/sec
Script Preparation code:
var n = [ "0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12", "13", "14", "15", "16", "17", "18", "19", "20", "21", "22", "23", "24", "25", "26", "27", "28", "29", "30", "31", "32", "33", "34", "35", "36", "37", "38", "39", "40", "41", "42", "43", "44", "45", "46", "47", "48", "49", "50", "51", "52", "53", "54", "55", "56", "57", "58", "59", "60", "61", "62", "63", "64", "65", "66", "67", "68", "69", "70", "71", "72", "73", "74", "75", "76", "77", "78", "79", "80", "81", "82", "83", "84", "85", "86", "87", "88", "89", "90", "91", "92", "93", "94", "95", "96", "97", "98", "99", ];
Tests:
parseInt
let i = 0; while (i < 10000) { i++; n.map((s) => parseInt(s)); }
+stringVar
let i = 0; while (i < 10000) { i++; n.map((s) => +s); }
stringVar * 1
let i = 0; while (i < 10000) { i++; n.map((s) => s * 1); }