feat: optimize SVD ?

scripts/benchmark.js

@@ -0,0 +1,39 @@
+
+
+
+let { Matrix, SVD, LU, EVD } = require('../matrix');
+
+const algorithms = [SVD, LU, EVD];
+
+const benchmarks = [];
+
+test(10);
+test(100);
+test(500);
+test(1000);
+test(1500);
+
+console.table(benchmarks);
+
+function test(size) {
+  const benchmark = {};
+  benchmark.size = size;
+  benchmarks.push(benchmark);
+
+  for (const Algo of algorithms) {
+    const matrix = Matrix.rand(size, size);
+    let count = 1;
+    const start = performance.now();
+    const results = [new Algo(matrix)];
+    const current = performance.now() - start;
+    if (current < 5000) {
+      count = Math.ceil(5000 / current);
+      for (let i = 0; i < count - 1; i++) {
+        results.push(new Algo(matrix));
+      }
+    }
+    const time = (performance.now() - start) / results.length;
+    benchmark[Algo.name] = time;
+    console.log(`${Algo.name} ${size}x${size} matrix: ${time}ms (${count}x)`)
+  }
+}

src/matrix.js

@@ -1579,11 +1579,13 @@ export default class Matrix extends AbstractMatrix {
 
   set(rowIndex, columnIndex, value) {
     this.data[rowIndex][columnIndex] = value;
+    //this.data[columnIndex][rowIndex] = value;
     return this;
   }
 
   get(rowIndex, columnIndex) {
     return this.data[rowIndex][columnIndex];
+    //return this.data[columnIndex][rowIndex];
   }
 
   removeRow(index) {