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Run results for:
Array isArray vs typeof vs array || []
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Run details:
User agent:
Mozilla/5.0 (iPhone; CPU iPhone OS 18_2_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.2 Mobile/15E148 Safari/604.1
Browser:
Mobile Safari 18
Operating system:
iOS 18.2.1
Device Platform:
Mobile
Date tested:
one year ago
Test name
Executions per second
typeof
151512944.0 Ops/sec
isArray
147435040.0 Ops/sec
array || []
146745568.0 Ops/sec
instanceOf
126509232.0 Ops/sec
Script Preparation code:
var test = [1,2,3,4]; var c;
Tests:
typeof
if (typeof test === 'object') { c++; }
isArray
if (Array.isArray(test)) { c++; }
array || []
if (test || []) { c++; }
instanceOf
if (test instanceof Array) { c++; }