Run results for: Split vs RegEx Brackets

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/93.0.4577.63 Safari/537.36

Browser: Chrome 93

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
Split	143.8 Ops/sec
RegEx	390.4 Ops/sec

Script Preparation code:

function generateSamples(size) {
    const random = (min, max) => Math.floor(Math.random() * (max -min + 1) + min);
	const samples = [];
    for(let i = 0; i < size; i++) {
  		const type = random(1, 200);
  		const index = random(1, 200);
    	samples.push("T_" + type + "["+ index + "]");
    }
    return samples;
}
var samples = generateSamples(20000);

Tests:

Split
var values = samples.map(x => x.split("[")[0]);
RegEx
var values = samples.map(x => x.match(/T_\d+/)[0]);