Benchmark: loop length recalculation - MeasureThat.net

Script Preparation code:

  var arr=new Array(1000000).fill(0)

Tests:

normal loop
for (var i=0;i<arr.length;i++){val=arr[i]}
loop without length
var l=arr.length; for (var i=0;i<l;i++){val=arr[i]}
reverse loop
for (var i=arr.length;i>0;i--){val=arr[i]}
weird trick
for (var i=arr.length;i>0;i--){val=arr[i]|0}

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
normal loop
loop without length
reverse loop
weird trick

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: 6 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/52.0.2743.116 Safari/537.36 Edge/15.15063

Browser/OS: Chrome 52 on Windows

View result in a separate tab

Test name	Executions per second
normal loop	3.9 Ops/sec
loop without length	4.9 Ops/sec
reverse loop	4.9 Ops/sec
weird trick	4.4 Ops/sec