Run results for: isFinite vs typeof

Run details:

User agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:137.0) Gecko/20100101 Firefox/137.0

Browser: Firefox 137

Operating system: Ubuntu

Device Platform: Desktop

Date tested: one year ago

typeof === "number"

48.5M/s

isFinite

47.9M/s

View exact numbers

Test name	Executions per second
✓ typeof === "number"	48,543,728 Ops/sec
isFinite	47,927,772 Ops/sec

Script Preparation code:

varsToCheck = [3, 3.14, "some string", null, undefined];
count = 0;

Tests:

isFinite
varsToCheck.forEach(function(v){ if(Number.isFinite(v)) { count++ } });
typeof === "number"
varsToCheck.forEach(function(v){ if(typeof v === "number") { count++ } });