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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?
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Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.2.1 Safari/605.1.15
Browser:
Safari 17
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
2 years ago
regex
7.7M/s
parseFloat()
7.6M/s
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Test name
Executions per second
✓
regex
7,665,828 Ops/sec
parseFloat()
7,572,790 Ops/sec
Tests:
parseFloat()
var string = parseFloat((3/2).toFixed(4)).toString();
regex
var string = (3/2).toFixed(4).replace(/\.?0*$/, '');