threads / patch / 22787

patchgit svn: delay importing SVN::Base until it is needed

Subject: [PATCH] git svn: delay importing SVN::Base until it is needed

## tl;dr

One message between Feb 24, 2010 and Feb 24, 2010. Diffs are folded; open one to read it.

replies: 0people: 1as markdown or json

josh robb· Feb 24, 2010, 03:13 UTC · lore

Importing functions from a .dll into Git for Windows' perl is pretty slow, so let's avoid importing if it is not necessary.

This seems particularly slow in virtualized enviroments. Before this change (on my machine):

$ time perl /libexec/git-core/git-svn rebase Current branch master is up to date.

real 2m56.750s user 0m3.129s sys 2m39.232s

Afterwards:

$ time perl /libexec/git-core/git-svn rebase Current branch master is up to date.

real 0m33.407s user 0m1.409s sys 0m23.054s

git svn rebase -n goes from 3m7.046s to 0m10.312s.
Signed-off-by: Josh Robb <josh_robb@fastmail.fm>
---
 git-svn.perl |   16 +++++++++++-----
 1 files changed, 11 insertions(+), 5 deletions(-)
Show changes to git-svn.perl +11 −5
diff --git a/git-svn.perl b/git-svn.perl
index 265852f..0e4572f 100755
--- a/git-svn.perl
+++ b/git-svn.perl
@@ -36,11 +36,13 @@ $ENV{TZ} = 'UTC';
 $| = 1; # unbuffer STDOUT

 sub fatal (@) { print STDERR "@_\n"; exit 1 }
-require SVN::Core; # use()-ing this causes segfaults for me... *shrug*
-require SVN::Ra;
-require SVN::Delta;
-if ($SVN::Core::VERSION lt '1.1.0') {
-	fatal "Need SVN::Core 1.1.0 or better (got $SVN::Core::VERSION)";
+sub _req_svn {
+	require SVN::Core; # use()-ing this causes segfaults for me... *shrug*
+	require SVN::Ra;
+	require SVN::Delta;
+	if ($SVN::Core::VERSION lt '1.1.0') {
+		fatal "Need SVN::Core 1.1.0 or better (got $SVN::Core::VERSION)";
+	}
 }
 my $can_compress = eval { require Compress::Zlib; 1};
 push @Git::SVN::Ra::ISA, 'SVN::Ra';
@@ -730,6 +732,8 @@ sub cmd_branch {
 		$src=~s/^http:/https:/;
 	}

+	::_req_svn();
+
 	my $ctx = SVN::Client->new(
 		auth    => Git::SVN::Ra::_auth_providers(),
 		log_msg => sub {
@@ -4859,6 +4863,8 @@ sub new {
 	$url =~ s!/+$!!;
 	return $RA if ($RA && $RA->{url} eq $url);

+	::_req_svn();
+
 	SVN::_Core::svn_config_ensure($config_dir, undef);
 	my ($baton, $callbacks) = SVN::Core::auth_open_helper(_auth_providers);
 	my $config = SVN::Core::config_get_config($config_dir);
-- 
1.7.0

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