Run results for: replace vs split/join

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:88.0) Gecko/20100101 Firefox/88.0

Browser: Firefox 88

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
replace	1451139.5 Ops/sec
split/join	1627833.2 Ops/sec

Tests:

replace
const rib = '4444333322221111'; const any4CharsGroupExceptLastOne = /.{4}(?<!$)/g; const nonBreakingHyphen = '‑'; const addHyphenToGroup = `$&${nonBreakingHyphen}`; `${rib}`.replace(any4CharsGroupExceptLastOne, addHyphenToGroup);
split/join
const rib = '4444333322221111'; const NON_BREAKING_HYPHEN = '‑'; rib.match(/.{1,4}/g).join(NON_BREAKING_HYPHEN);