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/*
* Copyright (C) 2018, Thomas Wolf <thomas.wolf@paranor.ch> 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.treewalk;
import static org.junit.Assert.fail;
import org.eclipse.jgit.api.Git;
import org.eclipse.jgit.junit.RepositoryTestCase;
import org.eclipse.jgit.treewalk.filter.PathFilter;
import org.junit.Test;
/**
* Simple performance test for git add / FileTreeIterator.
*/
public class FileTreeIteratorPerformanceTest extends RepositoryTestCase {
private static int N_OF_FILES = 501;
@Test
public void testPerformance() throws Exception {
try (Git git = new Git(db)) {
long times[] = new long[N_OF_FILES];
long sum = 0;
String lastName = null;
for (int i = 0; i < N_OF_FILES; i++) {
lastName = "a" + (i + 100000) + ".txt";
writeTrashFile(lastName, "");
long start = System.nanoTime();
git.add().addFilepattern(lastName).call();
long elapsed = System.nanoTime() - start;
times[i] = elapsed;
sum += elapsed;
}
System.out.println("Total (µs) " + sum / 1000.0);
for (int i = 0; i < times.length; i++) {
System.out
.println("Time " + i + " (µs) = " + times[i] / 1000.0);
}
FileTreeIterator iter = new FileTreeIterator(db);
try (TreeWalk walk = new TreeWalk(db)) {
walk.setFilter(PathFilter.create(lastName));
walk.addTree(iter);
long start = System.nanoTime();
if (walk.next()) {
System.out.println("Walk time (µs) = "
+ (System.nanoTime() - start) / 1000.0);
} else {
fail("File not found");
}
}
}
}
}
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