Run results for: Float string optimization: parseFloat() vs regex

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.36 OPR/107.0.0.0 (Edition std-1)

Browser: Opera 107

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

regex

9.3M/s

parseFloat()

6.3M/s

View exact numbers

Test name	Executions per second
✓ regex	9,332,878 Ops/sec
parseFloat()	6,294,064 Ops/sec

Tests:

parseFloat()
var string = parseFloat((3/2).toFixed(4)).toString();
regex
var string = (3/2).toFixed(4).replace(/\.?0*$/, '');

Run results for: Float string optimization: parseFloat() vs regex

To get a cleaned-up float number with a limited number of digits of precision, which is faster: parsefloat() or a regular expression?

parseFloat()

regex