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Run results for:
numeric vs string property accessor
compare setting and getting values of property accessed via numeric key and string key
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=602686" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.0 Safari/537.36
Browser:
Chrome 135
Operating system:
Windows
Device Platform:
Desktop
Date tested:
one year ago
numeric keys
107K/s
string keys, with key caching ("" + n)
57K/s
string keys, with key caching (n.toString())
48K/s
string keys
35K/s
View exact numbers
Test name
Executions per second
✓
numeric keys
107,312 Ops/sec
string keys, with key caching ("" + n)
57,493 Ops/sec
string keys, with key caching (n.toString())
48,176 Ops/sec
string keys
35,180 Ops/sec
Script Preparation code:
/*your preparation JavaScript code goes here To execute async code during the script preparation, wrap it as function globalMeasureThatScriptPrepareFunction, example:*/ async function globalMeasureThatScriptPrepareFunction() { // This function is optional, feel free to remove it. // await someThing(); }
Tests:
numeric keys
let o = {}; // write for (let n=1; n <= 1000; n++) { if (o[n] === undefined) o[n] = n; } // read let sum = 0; for (let n=1; n <= 1000; n++) { if (o[n] !== undefined) sum += o[n]; } //console.log("numeric keys - sum ", sum); // expects 500500 (1 - 1000)
string keys
let o = {}; // write for (let n=1; n <= 1000; n++) { if (o[n.toString()] === undefined) o[n.toString()] = n; } // read let sum = 0; for (let n=1; n <= 1000; n++) { if (o[n.toString()] !== undefined) sum += o[n.toString()]; } //console.log("string keys - sum ", sum); // expects 500500 (1 - 1000)
string keys, with key caching (n.toString())
let o = {}; let k; // write for (let n=1; n <= 1000; n++) { k = n.toString(); if (o[k] === undefined) o[k] = n; } // read let sum = 0; for (let n=1; n <= 1000; n++) { k = n.toString(); if (o[k] !== undefined) sum += o[k]; } //console.log("string keys - sum ", sum); // expects 500500 (1 - 1000)
string keys, with key caching ("" + n)
let o = {}; let k; // write for (let n=1; n <= 1000; n++) { k = "" + n; if (o[k] === undefined) o[k] = n; } // read let sum = 0; for (let n=1; n <= 1000; n++) { k = "" + n; if (o[k] !== undefined) sum += o[k]; } //console.log("string keys - sum ", sum); // expects 500500 (1 - 1000)