Benchmark: Substring vs Bitmask

Tests:

String()
let num = 255; let nums = []; for(let i = 0; i < 100; ++i) { nums.push(num.toString(2).padStart(8, '0').substring(0, 4)); }
.toString()
let num = 255; let nums = []; for(let i = 0; i < 100; ++i) { nums.push((num >> 4) & 0xF); }

Rendered benchmark preparation results:

Previous results

Test case name	Result
String()
.toString()

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Latest run results:

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

User agent: Mozilla/5.0 (X11; Ubuntu; Linux aarch64; rv:109.0) Gecko/20100101 Firefox/113.0

Browser/OS: Firefox 113 on Ubuntu

Test name	Executions per second
String()	727744.4 Ops/sec
.toString()	2994715.0 Ops/sec

Substring vs Bitmask (version: 0)