Run results for: isFinite vs typeof

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:141.0) Gecko/20100101 Firefox/141.0

Browser: Firefox 141

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

isFinite

20.9M/s

typeof === "number"

14.0M/s

View exact numbers

Test name	Executions per second
✓ isFinite	20,878,174 Ops/sec
typeof === "number"	14,001,101 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++ } });