Created
November 28, 2021 11:34
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package richardstartin; | |
import org.openjdk.jmh.annotations.Benchmark; | |
import org.openjdk.jmh.annotations.BenchmarkMode; | |
import org.openjdk.jmh.annotations.Fork; | |
import org.openjdk.jmh.annotations.Level; | |
import org.openjdk.jmh.annotations.Measurement; | |
import org.openjdk.jmh.annotations.Mode; | |
import org.openjdk.jmh.annotations.OperationsPerInvocation; | |
import org.openjdk.jmh.annotations.OutputTimeUnit; | |
import org.openjdk.jmh.annotations.Param; | |
import org.openjdk.jmh.annotations.Scope; | |
import org.openjdk.jmh.annotations.Setup; | |
import org.openjdk.jmh.annotations.State; | |
import org.openjdk.jmh.annotations.Warmup; | |
import org.openjdk.jmh.infra.Blackhole; | |
import java.util.HashMap; | |
import java.util.Map; | |
import java.util.concurrent.TimeUnit; | |
import java.util.stream.IntStream; | |
@State(Scope.Benchmark) | |
@OutputTimeUnit(TimeUnit.NANOSECONDS) | |
@BenchmarkMode(Mode.AverageTime) | |
public class CompositePixelLookup { | |
record Pixel(int x, int y) { | |
} | |
Map<String, Object> concatMap; | |
Map<Pixel, Object> pixelMap; | |
@Param("1024") | |
int width; | |
@Param("768") | |
int height; | |
@Setup(Level.Trial) | |
public void setup() { | |
concatMap = new HashMap<>(); | |
pixelMap = new HashMap<>(); | |
for (int x = 0; x < width; x++) { | |
for (int y = 0; y < height; y++) { | |
concatMap.put(x + ";" + y, x * 768 + y); | |
pixelMap.put(new Pixel(x, y), x * 768 + y); | |
} | |
} | |
} | |
@Benchmark | |
@OperationsPerInvocation(786432) | |
public void concatenate(Blackhole bh) { | |
for (int x = 0; x < width; x++) { | |
for (int y = 0; y < height; y++) { | |
bh.consume(concatMap.get(x + ";" + y)); | |
} | |
} | |
} | |
@Benchmark | |
@OperationsPerInvocation(786432) | |
public void wrap(Blackhole bh) { | |
for (int x = 0; x < width; x++) { | |
for (int y = 0; y < height; y++) { | |
bh.consume(pixelMap.get(new Pixel(x, y))); | |
} | |
} | |
} | |
} |
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