Benchmark: object keys vs loop

Script Preparation code:

var a = [{"id":7,"h":76},{"id":4,"h":34},{"id":9,"h":89}];
var b = [];
for(var i=0;i<a.length;i++)b[a[i].id] = a[i];
var d = [];

Tests:

Rendered benchmark preparation results:

Previous results

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Latest run results:

Run details: (Test run date: 7 years ago)

User agent: Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2840.99 Safari/537.36

Browser/OS: Chrome 54 on Windows 8.1

object keys vs loop (version: 0)