1 files changed, 75 insertions, 0 deletions
diff --git a/org.eclipse.jgit.benchmarks/src/org/eclipse/jgit/benchmarks/CreateFileSnapshotBenchmark.java b/org.eclipse.jgit.benchmarks/src/org/eclipse/jgit/benchmarks/CreateFileSnapshotBenchmark.java
new file mode 100644
index 0000000000..913ca5a9e8
--- /dev/null
+++ b/org.eclipse.jgit.benchmarks/src/org/eclipse/jgit/benchmarks/CreateFileSnapshotBenchmark.java
@@ -0,0 +1,75 @@
+/*
+ * Copyright (C) 2019, Matthias Sohn <matthias.sohn@sap.com> and others
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Distribution License v. 1.0 which is available at
+ * https://www.eclipse.org/org/documents/edl-v10.php.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+package org.eclipse.jgit.benchmarks;
+
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.concurrent.TimeUnit;
+
+import org.eclipse.jgit.internal.storage.file.FileSnapshot;
+import org.eclipse.jgit.util.FileUtils;
+import org.openjdk.jmh.annotations.Benchmark;
+import org.openjdk.jmh.annotations.BenchmarkMode;
+import org.openjdk.jmh.annotations.Measurement;
+import org.openjdk.jmh.annotations.Mode;
+import org.openjdk.jmh.annotations.OutputTimeUnit;
+import org.openjdk.jmh.annotations.Scope;
+import org.openjdk.jmh.annotations.Setup;
+import org.openjdk.jmh.annotations.State;
+import org.openjdk.jmh.annotations.TearDown;
+import org.openjdk.jmh.annotations.Warmup;
+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;
+
+@State(Scope.Thread)
+public class CreateFileSnapshotBenchmark {
+
+	Path path;
+
+	Path testDir;
+
+	@Setup
+	public void setupBenchmark() throws IOException {
+		testDir = Files.createTempDirectory("dir");
+		path = testDir.resolve("toSnapshot");
+		Files.createFile(path);
+	}
+
+	@TearDown
+	public void teardown() throws IOException {
+		FileUtils.delete(testDir.toFile(), FileUtils.RECURSIVE | FileUtils.RETRY);
+	}
+
+	@Benchmark
+	@BenchmarkMode({ Mode.AverageTime })
+	@OutputTimeUnit(TimeUnit.NANOSECONDS)
+    @Warmup(iterations = 5, time = 100, timeUnit = TimeUnit.MILLISECONDS)
+    @Measurement(iterations = 5, time = 100, timeUnit = TimeUnit.MILLISECONDS)
+	public Path testCreateFile() throws IOException {
+		return Files.createTempFile(testDir, "create", "");
+	}
+
+	@Benchmark
+	@BenchmarkMode({ Mode.AverageTime })
+	@OutputTimeUnit(TimeUnit.NANOSECONDS)
+	public FileSnapshot testCreateFileSnapshot() {
+		return FileSnapshot.save(path.toFile());
+	}
+
+	public static void main(String[] args) throws RunnerException {
+		Options opt = new OptionsBuilder()
+				.include(CreateFileSnapshotBenchmark.class.getSimpleName())
+				.forks(1).jvmArgs("-ea").build();
+		new Runner(opt).run();
+	}
+}