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Run results for:
instanceof vs undefined prop
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Run details:
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:139.0) Gecko/20100101 Firefox/139.0
Browser:
Firefox 139
Operating system:
Windows
Device Platform:
Desktop
Date tested:
11 months ago
Test name
Executions per second
instanceof
68608496.0 Ops/sec
checking prop
1412223872.0 Ops/sec
Script Preparation code:
var obj = {a:2};
Tests:
instanceof
obj instanceof Object
checking prop
obj.a === true