Run results for: For and Inverse For Loops

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/85.0.4183.102 Safari/537.36

Browser: Chrome 85

Operating system: Mac OS X 10.15.6

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
Regular Foor Loop	113434.3 Ops/sec
Inverse For Loop	182979.8 Ops/sec

Script Preparation code:

var matrix = [
	[[0,1,2,3], [1,2,3]],
	[[4,5,6,7], [4,5,7]],
	[[9,8,7], [8,5,2]],
]

var swapMatrix = [
	[[7,4,1,2], [3,2,1]],
	[[8,10,11,21], [13,14,15]],
	[[3,6,9], [7,5,3]],
 ]

Tests:

Regular Foor Loop
for(let i = 0; i < matrix.length; i++) { for(let j = 0; j < matrix[i].length; j++) { for(let k = 0; k < matrix[i][j].length; k++) { matrix[i][j][k] = swapMatrix[i][j][k] } } }
Inverse For Loop
for(let i = matrix.length - 1; i >= 0; i--) { for(let j = matrix[i].length - 1; j >= 0; j--) { for(let k = matrix[i][j].length - 1; k >= 0; k--) { matrix[i][j][k] = swapMatrix[i][j][k] } } }

Run results for: For and Inverse For Loops

Regular Foor Loop

Inverse For Loop