Benchmark: RegExp vs substring

Script Preparation code:

function getRandomInt(max) {
    return Math.floor(Math.random() * Math.floor(max));
}
var arr = [];
for (i = 0; i < 1000; i++) {
    arr.push("PROPERTY_" + getRandomInt(10000));
    arr.push("RUS_" + getRandomInt(10000));
}
var success = 0;

Tests:

RegExp
for(const value of arr) { if(/^PROPERTY_/.test(value)) success++; }
substring
for(const value of arr) { if(value.substring(0, 9) === "PROPERTY_") success++; }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
RegExp
substring

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:109.0) Gecko/20100101 Firefox/109.0

Browser/OS: Firefox 109 on Windows

View result in a separate tab

Test name	Executions per second
RegExp	2928.7 Ops/sec
substring	4927.6 Ops/sec

RegExp vs substring (version: 1)

Comparing performance of: RegExp vs substring

Created: 3 years ago by: Registered User

Jump to the latest result

RegExp

substring

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A