Add benchmark for Gauss3 on a small image

Author: maarzt

src/test/java/net/imglib2/algorithm/gauss3/Gauss3Benchmark.java

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+/*-
+ * #%L
+ * ImgLib2: a general-purpose, multidimensional image processing library.
+ * %%
+ * Copyright (C) 2009 - 2021 Tobias Pietzsch, Stephan Preibisch, Stephan Saalfeld,
+ * John Bogovic, Albert Cardona, Barry DeZonia, Christian Dietz, Jan Funke,
+ * Aivar Grislis, Jonathan Hale, Grant Harris, Stefan Helfrich, Mark Hiner,
+ * Martin Horn, Steffen Jaensch, Lee Kamentsky, Larry Lindsey, Melissa Linkert,
+ * Mark Longair, Brian Northan, Nick Perry, Curtis Rueden, Johannes Schindelin,
+ * Jean-Yves Tinevez and Michael Zinsmaier.
+ * %%
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * 
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ * #L%
+ */
+package net.imglib2.algorithm.gauss3;
+
+import net.imglib2.img.Img;
+import net.imglib2.img.array.ArrayImgs;
+import net.imglib2.parallel.Parallelization;
+import net.imglib2.type.numeric.real.DoubleType;
+import net.imglib2.view.Views;
+import org.openjdk.jmh.annotations.*;
+import org.openjdk.jmh.runner.Runner;
+import org.openjdk.jmh.runner.RunnerException;
+import org.openjdk.jmh.runner.options.Options;
+import org.openjdk.jmh.runner.options.OptionsBuilder;
+
+import java.util.concurrent.TimeUnit;
+
+/**
+ * Measure the time own execution of {@link Gauss3#gauss}.
+ */
+@Fork( 1 )
+@State( Scope.Benchmark )
+@Warmup( iterations = 5, time = 1, timeUnit = TimeUnit.SECONDS)
+@Measurement( iterations =  5, time = 1, timeUnit = TimeUnit.SECONDS )
+@BenchmarkMode( Mode.AverageTime )
+@OutputTimeUnit( TimeUnit.MILLISECONDS )
+public class Gauss3Benchmark
+{
+
+	private double sigma = 2.0;
+
+	private Img<DoubleType> source = ArrayImgs.doubles( 100, 100 );
+
+	private Img<DoubleType> target = ArrayImgs.doubles( 100, 100 );
+
+	@Benchmark
+	public void benchmark()
+	{
+		Gauss3.gauss( sigma, Views.extendBorder( source ), target);
+	}
+
+	public static void main( String[] args ) throws RunnerException
+	{
+		Options opt = new OptionsBuilder()
+				.include( Gauss3Benchmark.class.getSimpleName() )
+				.build();
+		new Runner( opt ).run();
+	}
+}