Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.127 Safari/537.36
Chrome 100
Windows
Desktop
2 years ago
Test name Executions per second
isFinite 535845.6 Ops/sec
typeof === "number" 1129057.2 Ops/sec
Script Preparation code:
AخA
 
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++ } });