Benchmark: Matrix Transpose

HTML Preparation code:

<!--your preparation HTML code goes here-->

Script Preparation code:

var An = 200, Ann = An*An;
var A = new Float64Array(Ann);
for(let i=0;i<Ann;i++)A[i]=Math.random()-0.5;

Tests:

transpose simple
const uFlat = new Float64Array(A), vFlat = new Float64Array(Ann); let m = An, n = An; for (let i = 0; i < m; i++) { for (let j = 0; j < n; j++) { vFlat[j * m + i] = uFlat[i * n + j] } }
transpose optimized
const uFlat = new Float64Array(A), vFlat = new Float64Array(Ann); let m = An, n = An; let vIndex = 0; for (let j = 0; j < n; j++) { let uIndex = j; for (let i = 0; i < m; i++) { vFlat[vIndex++] = uFlat[uIndex]; uIndex += n; } }

Rendered benchmark preparation results:

Previous results

Test case name	Result
transpose simple
transpose optimized

Latest run results:

Run details: (Test run date: 2 months ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:151.0) Gecko/20100101 Firefox/151.0

Browser/OS: Firefox 151 on Windows

transpose simple

5K/s

transpose optimized

5K/s

View exact numbers

Test name	Executions per second
✓ transpose simple	5,320 Ops/sec
transpose optimized	5,166 Ops/sec

Matrix Transpose (version: 2)