Run results for: Matrix Transpose

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 18_3_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) FxiOS/136.2 Mobile/15E148 Safari/605.1.15

Browser: Mobile Safari 18

Operating system: iOS 18.3.2

Device Platform: Mobile

Date tested: one year ago

Test name	Executions per second
transpose simple	11451.4 Ops/sec
transpose optimized	11990.2 Ops/sec

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; } }

Run results for: Matrix Transpose

transpose simple

transpose optimized