Run results for: regex /g vs /

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.149 Safari/537.36

Browser: Chrome 80

Operating system: Windows

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
with /g	1298965.0 Ops/sec
with /	1298495.0 Ops/sec

Tests:

with /g
const envRegex = /\^[a-zA-Z0-9_]+\b/g; const dataRegex = /\$[a-zA-Z0-9_]+\b/g; const dataenvRegex = /(\$|\^)[a-zA-Z0-9_]+\b/g; const eventRegex = /\@[a-zA-Z0-9_]+(?:\.[a-zA-Z0-9_]+|\b)(?:\b\[(#|\.)[a-zA-Z0-9_-]+\]|\b)/g; const str = " background-color: #f7f7f7; opacity: [[ $pageopacity ]]; --r-nonexistentvalue: [[ $noexist ]]; --r-somevar: [[ $somevar ]]; --someevent: [[ @mousemove.clientX[#myelement] ]]; --r-mx: [[ &add(&num(^mouse_clientX), &add(101px,22), 60) ]]px; --r-my: [[ &sub(^mouse_clientY, 20) ]]px;"; str.match(eventRegex);
with /
const envRegex = /\^[a-zA-Z0-9_]+\b/g; const dataRegex = /\$[a-zA-Z0-9_]+\b/g; const dataenvRegex = /(\$|\^)[a-zA-Z0-9_]+\b/g; const eventRegex = /\@[a-zA-Z0-9_]+(?:\.[a-zA-Z0-9_]+|\b)(?:\b\[(#|\.)[a-zA-Z0-9_-]+\]|\b)/g; const str = " background-color: #f7f7f7; opacity: [[ $pageopacity ]]; --r-nonexistentvalue: [[ $noexist ]]; --r-somevar: [[ $somevar ]]; --someevent: [[ @mousemove.clientX[#myelement] ]]; --r-mx: [[ &add(&num(^mouse_clientX), &add(101px,22), 60) ]]px; --r-my: [[ &sub(^mouse_clientY, 20) ]]px;"; str.match(eventRegex);