Benchmark: Array loop - MeasureThat.net

Script Preparation code:

var loopItems = [];
var i = 0;

for (i = 0; i < 1000000; i++) {
	loopItems.push(Math.random());
}

var process = function (i) {
	i++;
}

Tests:

Standard For loop i++
i = loopItems.length; for (var j = 0; j < i; j++) { process(loopItems[j]); }
Standard For loop i--
i = loopItems.length; for (var j = i; j > 0; j--) { process(loopItems[j]); }
While, i--
i = loopItems.length; while (i) { process(loopItems[i--]); }
While, with 8 iterations, with function call
i = Math.floor(loopItems.length / 8); while (i) { process(loopItems[i--]); process(loopItems[i--]); process(loopItems[i--]); process(loopItems[i--]); process(loopItems[i--]); process(loopItems[i--]); process(loopItems[i--]); process(loopItems[i--]); }
While, with 8 iterations, without function call
i = Math.floor(loopItems.length / 8); while (i) { loopItems[i--]++; loopItems[i--]++; loopItems[i--]++; loopItems[i--]++; loopItems[i--]++; loopItems[i--]++; loopItems[i--]++; loopItems[i--]++; }
While, with 50 iterations, with function call
i = Math.floor(loopItems.length / 50); while (i) { process(loopItems[i--]); process(loopItems[i--]); process(loopItems[i--]); process(loopItems[i--]); process(loopItems[i--]); process(loopItems[i--]); process(loopItems[i--]); process(loopItems[i--]); process(loopItems[i--]); process(loopItems[i--]); process(loopItems[i--]); process(loopItems[i--]); process(loopItems[i--]); process(loopItems[i--]); process(loopItems[i--]); process(loopItems[i--]); process(loopItems[i--]); process(loopItems[i--]); process(loopItems[i--]); process(loopItems[i--]); process(loopItems[i--]); process(loopItems[i--]); process(loopItems[i--]); process(loopItems[i--]); process(loopItems[i--]); process(loopItems[i--]); process(loopItems[i--]); process(loopItems[i--]); process(loopItems[i--]); process(loopItems[i--]); process(loopItems[i--]); process(loopItems[i--]); process(loopItems[i--]); process(loopItems[i--]); process(loopItems[i--]); process(loopItems[i--]); process(loopItems[i--]); process(loopItems[i--]); process(loopItems[i--]); process(loopItems[i--]); process(loopItems[i--]); process(loopItems[i--]); process(loopItems[i--]); process(loopItems[i--]); process(loopItems[i--]); process(loopItems[i--]); process(loopItems[i--]); process(loopItems[i--]); process(loopItems[i--]); process(loopItems[i--]); }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Standard For loop i++
Standard For loop i--
While, i--
While, with 8 iterations, with function call
While, with 8 iterations, without function call
While, with 50 iterations, with function call

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: 4 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.100 Safari/537.36

Browser/OS: Chrome 75 on Mac OS X 10.14.5

View result in a separate tab

Test name	Executions per second
Standard For loop i++	8.4 Ops/sec
Standard For loop i--	8.0 Ops/sec
While, i--	8.0 Ops/sec
While, with 8 iterations, with function call	66.3 Ops/sec
While, with 8 iterations, without function call	129.8 Ops/sec
While, with 50 iterations, with function call	391.2 Ops/sec

Array loop (version: 0)

Comparing performance of: Standard For loop i++ vs Standard For loop i-- vs While, i-- vs While, with 8 iterations, with function call vs While, with 8 iterations, without function call vs While, with 50 iterations, with function call

Created: 7 years ago by: Guest

Jump to the latest result

Standard For loop i++

Standard For loop i--

While, i--

While, with 8 iterations, with function call

While, with 8 iterations, without function call

While, with 50 iterations, with function call

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A