From e6375445d143d0335a9f5707e9bae1644cbef576 Mon Sep 17 00:00:00 2001
From: Matthias Sohn <matthias.sohn@sap.com>
Date: Sun, 4 Mar 2018 10:42:46 +0100
Subject: [PATCH] Configure WindowCache settings to use in JGit CLI

Set the same defaults as in EGit.
Use mmap to map git packfiles into memory.

Change-Id: I7997b9123448a762192d7eeb55e01432549fba98
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
---
 .../src/org/eclipse/jgit/pgm/Main.java                 | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/org.eclipse.jgit.pgm/src/org/eclipse/jgit/pgm/Main.java b/org.eclipse.jgit.pgm/src/org/eclipse/jgit/pgm/Main.java
index 75612be753..33c5475d10 100644
--- a/org.eclipse.jgit.pgm/src/org/eclipse/jgit/pgm/Main.java
+++ b/org.eclipse.jgit.pgm/src/org/eclipse/jgit/pgm/Main.java
@@ -71,6 +71,7 @@ import org.eclipse.jgit.lib.RepositoryBuilder;
 import org.eclipse.jgit.pgm.internal.CLIText;
 import org.eclipse.jgit.pgm.opt.CmdLineParser;
 import org.eclipse.jgit.pgm.opt.SubcommandHandler;
+import org.eclipse.jgit.storage.file.WindowCacheConfig;
 import org.eclipse.jgit.transport.HttpTransport;
 import org.eclipse.jgit.transport.http.apache.HttpClientConnectionFactory;
 import org.eclipse.jgit.util.CachedAuthenticator;
@@ -105,10 +106,19 @@ public class Main {
 
 	private ExecutorService gcExecutor;
 
+	private static final int MB = 1024 * 1024;
+
 	/**
 	 * <p>Constructor for Main.</p>
 	 */
 	public Main() {
+		final WindowCacheConfig c = new WindowCacheConfig();
+		c.setPackedGitMMAP(true);
+		c.setPackedGitWindowSize(8 * 1024);
+		c.setPackedGitLimit(10 * MB);
+		c.setDeltaBaseCacheLimit(10 * MB);
+		c.setStreamFileThreshold(50 * MB);
+		c.install();
 		HttpTransport.setConnectionFactory(new HttpClientConnectionFactory());
 		BuiltinLFS.register();
 		gcExecutor = Executors.newSingleThreadExecutor(new ThreadFactory() {
-- 
2.39.5