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git-svn: lazy load some modules

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We can delay loading some modules until we need them for uncommon
code paths.  For example, persistent memoization is not often
needed, so we can avoid loading the modules for it until we
encounter svn::mergeinfo during fetch.

This gives a tiny reduction in syscalls (from 15641 to 15305) when
running "git svn info" and counting via "strace -fc".  Further,
more invasive work will be needed to noticeably improve performance.

Signed-off-by: Eric Wong <normalperson@yhbt.net>
This commit is contained in:
Eric Wong
2015-01-15 08:54:22 +00:00
parent 7f4ba4b6e3
commit 47092c1067
5 changed files with 26 additions and 20 deletions
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5
perl/Git/SVN/Ra.pm
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@ -3,7 +3,6 @@ use vars qw/@ISA $config_dir $_ignore_refs_regex $_log_window_size/;
use strict;
use warnings;
use Memoize;
use SVN::Client;
use Git::SVN::Utils qw(
canonicalize_url
canonicalize_path
@ -42,6 +41,7 @@ END {
}
sub _auth_providers () {
require SVN::Client;
my @rv = (
SVN::Client::get_simple_provider(),
SVN::Client::get_ssl_server_trust_file_provider(),
@ -247,7 +247,10 @@ sub get_log {
$ret;
}
# uncommon, only for ancient SVN (<= 1.4.2)
sub trees_match {
require IO::File;
require SVN::Client;
my ($self, $url1, $rev1, $url2, $rev2) = @_;
my $ctx = SVN::Client->new(auth => _auth_providers);
my $out = IO::File->new_tmpfile;