Run results for: regex v regex

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.142 Safari/537.36

Browser: Chrome 75

Operating system: Windows

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
full regex	1423983.0 Ops/sec
small regex	1441168.0 Ops/sec

Script Preparation code:

string1 = "this is a long string with tagsand other things and information about life and what you would do if there were traps and mines and other things that would impose themselves on this journey if there were traps and mines and other things that would impose themselves on this journ if there were traps and mines and other things that would impose themselves on this journ if there were traps and mines and other things that would impose themselves on this journ if there were traps and mines and other things that would impose themselves on this journ if there were traps and mines and other things that would impose themselves on this journ if there were traps and mines and other things that would impose themselves on this journif there were traps and mines and other things that would impose themselves on this journ if there were traps and mines and other things that would impose themselves on this journ if there were traps and mines and other things that would impose themselves on this journ if there were traps and mines and other things that would impose themselves on this journ <br>"

Tests:

full regex
const sth = string1.replace(/<(?!br|span|html|b|a|p|i|ul|li|blockquote|hr|div|h[1-6])/g, "<");
small regex
const sth = string1.replace(/<(?!br|span)/g, "<");

Run results for: regex v regex

full regex

small regex