Benchmark: Testing array lookup vs storing it in a variable first

Script Preparation code:

var arr = new Array(100_000)
for (let i=0; i< 100_000; ++i) {
	arr[i] = {
    	x1: Math.random(),
      	x2: Math.random(),
      	x3: Math.random(),
      	x4: Math.random(),
      	x5: Math.random()
    }
}

Tests:

as i
for (let i=0; i< arr.length; ++i) { arr[i].x1 += 10 arr[i].x2 += 10 arr[i].x3 += 10 arr[i].x4 += 10 arr[i].x5 += 10 }
as vari
for (let i=0; i< arr.length; ++i) { let iter = arr[i] iter.x1 += 10 iter.x2 += 10 iter.x3 += 10 iter.x4 += 10 iter.x5 += 10 }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
as i
as vari

Fastest: N/A

Slowest: N/A

ⓘ Get performance results from real users on your website with Request Metrics.

Website Performance Monitoring by Request Metrics

Latest run results:

Run details: (Test run date: 10 months ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.0.0 Safari/537.36

Browser/OS: Chrome 114 on Windows

View result in a separate tab

Test name	Executions per second
as i	32.6 Ops/sec
as vari	98.5 Ops/sec

Testing array lookup vs storing it in a variable first (version: 0)

Comparing performance of: as i vs as vari

Created: 10 months ago by: Guest

Jump to the latest result

as i

as vari

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A