Run results for: isFinite vs is undefined

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:123.0) Gecko/20100101 Firefox/123.0

Browser: Firefox 123

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

is undefined

9.9M/s

isFinite

8.7M/s

View exact numbers

Test name	Executions per second
✓ is undefined	9,934,898 Ops/sec
isFinite	8,673,759 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++ } });
is undefined
varsToCheck.forEach(function(v){ if(v !== undefined) { count++ } });