Run results for: Remove from array

Run details:

User agent: Mozilla/5.0 (Linux; Android 6.0; HUAWEI VNS-L31 Build/HUAWEIVNS-L31) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2840.85 Mobile Safari/537.36

Browser: Chrome Mobile 54

Operating system: Android 6.0

Device Platform: HUAWEI VNS-L31

Date tested: 7 years ago

Test name	Executions per second
Default	551306.2 Ops/sec
Reverse	555446.2 Ops/sec
Fix	563179.8 Ops/sec
Fix without copy	184683.2 Ops/sec

Script Preparation code:

var letters = ["A", "B", "C", "D", "E", "F"];

Tests:

Default
var copy = letters.slice(); var length = copy.length; for (var i = 0; i < length; i++) { if (copy[i] === "B" || copy[i] === "C") { letters.splice(letters.indexOf(copy[i]), 1); } }
Reverse
var copy = letters.slice(); var length = copy.length; for (var i = length - 1; i >= 0; i--) { if (copy[i] === "B" || copy[i] === "C") { letters.splice(i, 1); } }
Fix
var copy = letters.slice(); var length = copy.length; for (var i = 0; i < length; i++) { if (copy[i] === "B" || copy[i] === "C") { letters.splice(i, 1); i--; } }
Fix without copy
var length = letters.length; for (var i = 0; i < length; i++) { if (letters[i] === "B" || letters[i] === "C") { letters.splice(i, 1); i--; } }

Run results for: Remove from array

Remove from array

Default

Reverse

Fix

Fix without copy