Having these things is a test suite is dubious, but useful
anyway.
Signed-off-by: Robin Rosenberg <robin.rosenberg@xxxxxxxxxx>
---
.../tst/org/spearce/jgit/lib/SpeedTestBase.java | 48 ++++++++++++++++
.../spearce/jgit/lib/T0005_ShallowSpeedTest.java | 67 ++++++++++++++++++++++
.../org/spearce/jgit/lib/T0006_DeepSpeedTest.java | 70 +++++++++++++++++++++++
3 files changed, 185 insertions(+), 0 deletions(-)
diff --git a/org.spearce.jgit/tst/org/spearce/jgit/lib/SpeedTestBase.java b/org.spearce.jgit/tst/org/spearce/jgit/lib/SpeedTestBase.java
new file mode 100644
index 0000000..6601407
--- /dev/null
+++ b/org.spearce.jgit/tst/org/spearce/jgit/lib/SpeedTestBase.java
@@ -0,0 +1,48 @@
+package org.spearce.jgit.lib;
+
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.FileReader;
+import java.io.IOException;
+import java.io.InputStream;
+
+import junit.framework.TestCase;
+
+public abstract class SpeedTestBase extends TestCase {
+ protected long nativeTime;
+ protected String kernelrepo;
+
+ protected void prepare(String[] refcmd) throws Exception {
+ try {
+ BufferedReader bufferedReader = new BufferedReader(new FileReader("kernel.ref"));
+ kernelrepo = bufferedReader.readLine();
+ bufferedReader.close();
+ timeNativeGit(kernelrepo, refcmd);
+ nativeTime = timeNativeGit(kernelrepo, refcmd);
+ } catch (Exception e) {
+ System.out.println("Create a file named kernel.ref and put the path to the Linux kernels repository there");
+ throw e;
+ }
+ }
+
+ private static long timeNativeGit(String kernelrepo, String[] refcmd) throws IOException,
+ InterruptedException, Exception {
+ long start = System.currentTimeMillis();
+ Process p = Runtime.getRuntime().exec(refcmd, null, new File(kernelrepo,".."));
+ InputStream inputStream = p.getInputStream();
+ InputStream errorStream = p.getErrorStream();
+ byte[] buf=new byte[1024*1024];
+ while (inputStream.read(buf)>=0)
+ ; // empty
+ if (p.waitFor()!=0) {
+ int c;
+ while ((c=errorStream.read())!=-1)
+ System.err.print((char)c);
+ throw new Exception("git log failed");
+ }
+ inputStream.close();
+ errorStream.close();
+ long stop = System.currentTimeMillis();
+ return stop - start;
+ }
+}
diff --git a/org.spearce.jgit/tst/org/spearce/jgit/lib/T0005_ShallowSpeedTest.java b/org.spearce.jgit/tst/org/spearce/jgit/lib/T0005_ShallowSpeedTest.java
new file mode 100644
index 0000000..7187e9a
--- /dev/null
+++ b/org.spearce.jgit/tst/org/spearce/jgit/lib/T0005_ShallowSpeedTest.java
@@ -0,0 +1,67 @@
+/*
+ * Copyright (C) 2006 Robin Rosenberg <robin.rosenberg@xxxxxxxxxx>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License, version 2.1, as published by the Free Software Foundation.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
+ */
+package org.spearce.jgit.lib;
+
+import java.io.File;
+import java.io.IOException;
+import java.util.List;
+
+import junit.textui.TestRunner;
+
+public class T0005_ShallowSpeedTest extends SpeedTestBase {
+
+ protected void setUp() throws Exception {
+ prepare(new String[] { "git", "rev-list", "365bbe0d0caaf2ba74d56556827babf0bc66965d" });
+ }
+
+ public void testShallowHistoryScan() throws IOException {
+ long start = System.currentTimeMillis();
+ Repository db = new Repository(new File(kernelrepo));
+ Commit commit = db.mapCommit("365bbe0d0caaf2ba74d56556827babf0bc66965d");
+ int n = 1;
+ do {
+ // System.out.println("commit="+commit.getCommitId());
+ List parent = commit.getParentIds();
+ if (parent.size() > 0) {
+ ObjectId parentId = (ObjectId) parent.get(0);
+ commit = db.mapCommit(parentId);
+ commit.getCommitId().toString();
+ ++n;
+ } else {
+ commit = null;
+ }
+ } while (commit != null);
+ assertEquals(12275, n);
+ long stop = System.currentTimeMillis();
+ long time = stop - start;
+ System.out.println("native="+nativeTime);
+ System.out.println("jgit="+time);
+ // ~0.750s (hot cache), ok
+ /*
+native=1748
+jgit=774
+ */
+ // native git seems to run SLOWER than jgit here, at roughly half the speed
+ // creating the git process is not the issue here, btw.
+ long factor10 = (nativeTime*110/time+50)/100;
+ assertEquals(2, factor10);
+ }
+
+ public static void main(String[] args) {
+ TestRunner.run(T0005_ShallowSpeedTest.class);
+ }
+}
diff --git a/org.spearce.jgit/tst/org/spearce/jgit/lib/T0006_DeepSpeedTest.java b/org.spearce.jgit/tst/org/spearce/jgit/lib/T0006_DeepSpeedTest.java
new file mode 100644
index 0000000..5bd480c
--- /dev/null
+++ b/org.spearce.jgit/tst/org/spearce/jgit/lib/T0006_DeepSpeedTest.java
@@ -0,0 +1,70 @@
+/*
+ * Copyright (C) 2006 Shawn Pearce <spearce@xxxxxxxxxxx>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License, version 2.1, as published by the Free Software Foundation.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
+ */
+package org.spearce.jgit.lib;
+
+import java.io.File;
+import java.io.IOException;
+import java.util.List;
+
+import junit.textui.TestRunner;
+
+public class T0006_DeepSpeedTest extends SpeedTestBase {
+
+ protected void setUp() throws Exception {
+ prepare(new String[] { "git", "rev-list", "365bbe0d0caaf2ba74d56556827babf0bc66965d","--","net/netfilter/nf_queue.c" });
+ }
+
+ public void testDeepHistoryScan() throws IOException {
+ long start = System.currentTimeMillis();
+ Repository db = new Repository(new File(kernelrepo));
+ Commit commit = db.mapCommit("365bbe0d0caaf2ba74d56556827babf0bc66965d");
+ int n = 1;
+ do {
+ // System.out.println("commit="+commit.getCommitId());
+ List parent = commit.getParentIds();
+ if (parent.size() > 0) {
+ ObjectId parentId = (ObjectId) parent.get(0);
+ commit = db.mapCommit(parentId);
+ TreeEntry m = commit.getTree().findMember("net/netfilter/nf_queue.c");
+ if (m != null)
+ commit.getCommitId().toString();
+ ++n;
+ } else {
+ commit = null;
+ }
+ } while (commit != null);
+ //
+ assertEquals(12275, n);
+ long stop = System.currentTimeMillis();
+ long time = stop - start;
+ System.out.println("native="+nativeTime);
+ System.out.println("jgit="+time);
+ /*
+ native=1355
+ jgit=5449
+ */
+ // This is not an exact factor, but we'd expect native git to perform this
+ // about 4 times quicker. If for some reason we find jgit to be faster than
+ // this the cause should be found and secured.
+ long factor = (time*110/nativeTime+50)/100;
+ assertEquals(4, factor);
+ }
+
+ public static void main(String[] args) {
+ TestRunner.run(T0006_DeepSpeedTest.class);
+ }
+}
-
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