dupirefr/dupire.francois+pro@gmail.com [BAEL-3606] Matrix Multiplication Libraries Comparison (#8298)

* Added benchmarking on larger matrices * [BAEL-3606] Moved benchmarking to production code * [BAEL-3606] Added minor fix
2019-12-03 06:53:52 +01:00
parent bd87e517dc
commit 1b81033840
4 changed files with 172 additions and 3 deletions
@@ -1,84 +0,0 @@
-package com.baeldung.matrices;
-
-import cern.colt.matrix.DoubleFactory2D;
-import cern.colt.matrix.DoubleMatrix2D;
-import cern.colt.matrix.linalg.Algebra;
-import org.apache.commons.math3.linear.Array2DRowRealMatrix;
-import org.apache.commons.math3.linear.RealMatrix;
-import org.ejml.simple.SimpleMatrix;
-import org.la4j.Matrix;
-import org.la4j.matrix.dense.Basic2DMatrix;
-import org.nd4j.linalg.api.ndarray.INDArray;
-import org.nd4j.linalg.factory.Nd4j;
-import org.openjdk.jmh.annotations.Benchmark;
-import org.openjdk.jmh.annotations.Mode;
-import org.openjdk.jmh.runner.Runner;
-import org.openjdk.jmh.runner.options.Options;
-import org.openjdk.jmh.runner.options.OptionsBuilder;
-
-import java.util.concurrent.TimeUnit;
-
-public class MatrixMultiplicationBenchmarking {
-
-    public static void main(String[] args) throws Exception {
-        Options opt = new OptionsBuilder()
-          .include(MatrixMultiplicationBenchmarking.class.getSimpleName())
-          .mode(Mode.AverageTime)
-          .forks(2)
-          .warmupIterations(5)
-          .measurementIterations(10)
-          .timeUnit(TimeUnit.MICROSECONDS)
-          .build();
-
-        new Runner(opt).run();
-    }
-
-    @Benchmark
-    public Object homemadeMatrixMultiplication(MatrixProvider matrixProvider) {
-        return HomemadeMatrix.multiplyMatrices(matrixProvider.getFirstMatrix(), matrixProvider.getSecondMatrix());
-    }
-
-    @Benchmark
-    public Object ejmlMatrixMultiplication(MatrixProvider matrixProvider) {
-        SimpleMatrix firstMatrix = new SimpleMatrix(matrixProvider.getFirstMatrix());
-        SimpleMatrix secondMatrix = new SimpleMatrix(matrixProvider.getSecondMatrix());
-
-        return firstMatrix.mult(secondMatrix);
-    }
-
-    @Benchmark
-    public Object apacheCommonsMatrixMultiplication(MatrixProvider matrixProvider) {
-        RealMatrix firstMatrix = new Array2DRowRealMatrix(matrixProvider.getFirstMatrix());
-        RealMatrix secondMatrix = new Array2DRowRealMatrix(matrixProvider.getSecondMatrix());
-
-        return firstMatrix.multiply(secondMatrix);
-    }
-
-    @Benchmark
-    public Object la4jMatrixMultiplication(MatrixProvider matrixProvider) {
-        Matrix firstMatrix = new Basic2DMatrix(matrixProvider.getFirstMatrix());
-        Matrix secondMatrix = new Basic2DMatrix(matrixProvider.getSecondMatrix());
-
-        return firstMatrix.multiply(secondMatrix);
-    }
-
-    @Benchmark
-    public Object nd4jMatrixMultiplication(MatrixProvider matrixProvider) {
-        INDArray firstMatrix = Nd4j.create(matrixProvider.getFirstMatrix());
-        INDArray secondMatrix = Nd4j.create(matrixProvider.getSecondMatrix());
-
-        return firstMatrix.mmul(secondMatrix);
-    }
-
-    @Benchmark
-    public Object coltMatrixMultiplication(MatrixProvider matrixProvider) {
-        DoubleFactory2D doubleFactory2D = DoubleFactory2D.dense;
-
-        DoubleMatrix2D firstMatrix = doubleFactory2D.make(matrixProvider.getFirstMatrix());
-        DoubleMatrix2D secondMatrix = doubleFactory2D.make(matrixProvider.getSecondMatrix());
-
-        Algebra algebra = new Algebra();
-        return algebra.mult(firstMatrix, secondMatrix);
-    }
-
-}
@@ -1,33 +0,0 @@
-package com.baeldung.matrices;
-
-import org.openjdk.jmh.annotations.Scope;
-import org.openjdk.jmh.annotations.State;
-
-@State(Scope.Benchmark)
-public class MatrixProvider {
-    private double[][] firstMatrix;
-    private double[][] secondMatrix;
-
-    public MatrixProvider() {
-        firstMatrix =
-          new double[][] {
-            new double[] {1d, 5d},
-            new double[] {2d, 3d},
-            new double[] {1d ,7d}
-          };
-
-        secondMatrix =
-          new double[][] {
-            new double[] {1d, 2d, 3d, 7d},
-            new double[] {5d, 2d, 8d, 1d}
-          };
-    }
-
-    public double[][] getFirstMatrix() {
-        return firstMatrix;
-    }
-
-    public double[][] getSecondMatrix() {
-        return secondMatrix;
-    }
-}