Benchmark: object key vs indexof

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[i] = a[i].id;
var c = [];
for(var i=0;i<a.length;i++)c[a[i].id] = a[i];

Tests:

loop lookup
for(var i in a)if(i.id==9)return i;
array indexed
return a[b.indexOf(9)];
key lookup
return c[9];

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
loop lookup
array indexed
key lookup

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: 2 months ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.36

Browser/OS: Chrome 121 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
loop lookup	5894736.0 Ops/sec
array indexed	10358340.0 Ops/sec
key lookup	20139960.0 Ops/sec

object key vs indexof (version: 0)

Comparing performance of: loop lookup vs array indexed vs key lookup

Created: 7 years ago by: Guest

Jump to the latest result

loop lookup

array indexed

key lookup

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A