Benchmark: REPLACE STRSUBTR VS REGEX REPLACE

Tests:

str substr replace
var x = 0; var TOTAL_STRINGS = 1000; var data = "00000000000000000000"; while (x < TOTAL_STRINGS) { const str = data.substr(0,5) + '1' + data.substr(6); x += 1; }
regex replace
var x = 0; var TOTAL_STRINGS = window.TOTAL_STRINGS; var data = "00000000000000000000"; const regex = /(\w{5})0(.*)/gm; const subst = `$11$2`; while (x < TOTAL_STRINGS) { const str = data.replace(regex,subst); x += 1; }

Rendered benchmark preparation results:

Previous results

Test case name	Result
str substr replace
regex replace

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Latest run results:

Run details: (Test run date: 4 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:69.0) Gecko/20100101 Firefox/69.0

Browser/OS: Firefox 69 on Windows

Test name	Executions per second
str substr replace	139650.5 Ops/sec
regex replace	1409210.0 Ops/sec

REPLACE STRSUBTR VS REGEX REPLACE (version: 0)