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chalstrick/PerfTest_NFSFile.java

Created June 7, 2018 14:07
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test NFSFile performance
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PerfTest_NFSFile.java
import java.io.File;
import java.io.IOException;
import java.nio.file.FileVisitResult;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.nio.file.SimpleFileVisitor;
import java.nio.file.attribute.BasicFileAttributes;
import org.eclipse.jgit.api.Git;
import org.eclipse.jgit.api.errors.GitAPIException;
import org.eclipse.jgit.api.errors.JGitInternalException;
import org.eclipse.jgit.errors.ConfigInvalidException;
import org.eclipse.jgit.lib.ConfigConstants;
import org.eclipse.jgit.lib.StoredConfig;
import org.eclipse.jgit.util.FS;
public class PerfTest_NFSFile {
private static final int NR_OF_FOLDERS = 100;
private static final int NR_OF_FILES = 1000;
public static void main(String args[]) throws IOException, GitAPIException, JGitInternalException, ConfigInvalidException {
long start, end;
int found;
Path tmp = Files.createDirectory(Paths.get("tmp_" + System.currentTimeMillis()));
try (Git git = Git.init().setDirectory(tmp.toFile()).call()) {
System.out.println("Repo created in " + tmp.toRealPath());
for (int i = 0; i < NR_OF_FOLDERS; i++) {
File d = new File(tmp.toFile(), "test" + i);
d.mkdirs();
for (int j = 0; j < NR_OF_FILES; j++)
new File(d, "test" + j).createNewFile();
}
found = 0;
start = System.currentTimeMillis();
for (int i = 0; i < NR_OF_FOLDERS; i++) {
File d = new File(tmp.toFile(), "test" + i);
for (int j = 0; j < NR_OF_FILES; j++) {
if (new File(d, "test" + j).exists())
found++;
}
}
end = System.currentTimeMillis();
System.out.println("Instantiated " + NR_OF_FILES * NR_OF_FOLDERS
+ " File objects for existing files and checked explicitly for existence (found " + found
+ " files) in " + (end - start) + " ms.");
FS fs = git.getRepository().getFS();
found = 0;
start = System.currentTimeMillis();
for (int i = 0; i < NR_OF_FOLDERS; i++) {
File d = fs.createFile(tmp.toFile(), "test" + i);
for (int j = 0; j < NR_OF_FILES; j++) {
if (fs.createFile(d, "test" + j).exists())
found++;
}
}
end = System.currentTimeMillis();
System.out.println("Instantiated " + NR_OF_FILES * NR_OF_FOLDERS
+ " NFSFile objects for existing files and checked explicitly for existence (found " + found
+ " files) in " + (end - start) + " ms.");
StoredConfig cfg = git.getRepository().getConfig();
cfg.setBoolean(ConfigConstants.CONFIG_CORE_SECTION, null,
ConfigConstants.CONFIG_KEY_REFRESHFOLDERSTAT, true);
cfg.save();
git.getRepository().getConfig().load();
found = 0;
start = System.currentTimeMillis();
for (int i = 0; i < NR_OF_FOLDERS; i++) {
File d = fs.createFile(tmp.toFile(), "test" + i);
for (int j = 0; j < NR_OF_FILES; j++) {
if (fs.createFile(d, "test" + j).exists())
found++;
}
}
end = System.currentTimeMillis();
System.out.println("Instantiated in a repo with CONFIG_KEY_REFRESHFOLDERSTAT set to true " + NR_OF_FILES * NR_OF_FOLDERS
+ " NFSFile objects for existing files and checked explicitly for existence (found " + found
+ " files) in " + (end - start) + " ms.");
} finally {
Files.walkFileTree(tmp, new SimpleFileVisitor<Path>() {
public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException {
Files.delete(file);
return FileVisitResult.CONTINUE;
}
public FileVisitResult postVisitDirectory(Path dir, IOException exc) throws IOException {
Files.delete(dir);
return FileVisitResult.CONTINUE;
}
});
}
}
}
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