summaryrefslogtreecommitdiff
path: root/perl/Git/SVN.pm
diff options
context:
space:
mode:
authorlin zuojian <manjian2006@gmail.com>2014-01-23 02:15:19 (GMT)
committerEric Wong <normalperson@yhbt.net>2014-01-23 02:54:26 (GMT)
commitab0bcec9873f1fcef6c4b8825cc9e762c636ca9e (patch)
tree28a78a98db9e1b8fabe193072cfaec19cb67a529 /perl/Git/SVN.pm
parentd9bb4be53bc5185244b4be9860562a012803bacb (diff)
downloadgit-ab0bcec9873f1fcef6c4b8825cc9e762c636ca9e.zip
git-ab0bcec9873f1fcef6c4b8825cc9e762c636ca9e.tar.gz
git-ab0bcec9873f1fcef6c4b8825cc9e762c636ca9e.tar.bz2
git-svn: memoize _rev_list and rebuild
According to profile data, _rev_list and rebuild consume a large portion of time. Memoize the results of _rev_list and memoize rebuild internals to avoid subprocess invocation. When importing 15152 revisions on a LAN, time improved from 10 hours to 3-4 hours. Signed-off-by: lin zuojian <manjian2006@gmail.com> Signed-off-by: Eric Wong <normalperson@yhbt.net>
Diffstat (limited to 'perl/Git/SVN.pm')
-rw-r--r--perl/Git/SVN.pm41
1 files changed, 38 insertions, 3 deletions
diff --git a/perl/Git/SVN.pm b/perl/Git/SVN.pm
index 5273ee8..6e804a2 100644
--- a/perl/Git/SVN.pm
+++ b/perl/Git/SVN.pm
@@ -1599,6 +1599,7 @@ sub tie_for_persistent_memoization {
my %lookup_svn_merge_cache;
my %check_cherry_pick_cache;
my %has_no_changes_cache;
+ my %_rev_list_cache;
tie_for_persistent_memoization(\%lookup_svn_merge_cache,
"$cache_path/lookup_svn_merge");
@@ -1620,6 +1621,14 @@ sub tie_for_persistent_memoization {
SCALAR_CACHE => ['HASH' => \%has_no_changes_cache],
LIST_CACHE => 'FAULT',
;
+
+ tie_for_persistent_memoization(\%_rev_list_cache,
+ "$cache_path/_rev_list");
+ memoize '_rev_list',
+ SCALAR_CACHE => 'FAULT',
+ LIST_CACHE => ['HASH' => \%_rev_list_cache],
+ ;
+
}
sub unmemoize_svn_mergeinfo_functions {
@@ -1629,6 +1638,7 @@ sub tie_for_persistent_memoization {
Memoize::unmemoize 'lookup_svn_merge';
Memoize::unmemoize 'check_cherry_pick';
Memoize::unmemoize 'has_no_changes';
+ Memoize::unmemoize '_rev_list';
}
sub clear_memoized_mergeinfo_caches {
@@ -1959,11 +1969,25 @@ sub rebuild_from_rev_db {
unlink $path or croak "unlink: $!";
}
+#define a global associate map to record rebuild status
+my %rebuild_status;
+#define a global associate map to record rebuild verify status
+my %rebuild_verify_status;
+
sub rebuild {
my ($self) = @_;
my $map_path = $self->map_path;
my $partial = (-e $map_path && ! -z $map_path);
- return unless ::verify_ref($self->refname.'^0');
+ my $verify_key = $self->refname.'^0';
+ if (!$rebuild_verify_status{$verify_key}) {
+ my $verify_result = ::verify_ref($verify_key);
+ if ($verify_result) {
+ $rebuild_verify_status{$verify_key} = 1;
+ }
+ }
+ if (!$rebuild_verify_status{$verify_key}) {
+ return;
+ }
if (!$partial && ($self->use_svm_props || $self->no_metadata)) {
my $rev_db = $self->rev_db_path;
$self->rebuild_from_rev_db($rev_db);
@@ -1977,10 +2001,21 @@ sub rebuild {
print "Rebuilding $map_path ...\n" if (!$partial);
my ($base_rev, $head) = ($partial ? $self->rev_map_max_norebuild(1) :
(undef, undef));
+ my $key_value = ($head ? "$head.." : "") . $self->refname;
+ if (exists $rebuild_status{$key_value}) {
+ print "Done rebuilding $map_path\n" if (!$partial || !$head);
+ my $rev_db_path = $self->rev_db_path;
+ if (-f $self->rev_db_path) {
+ unlink $self->rev_db_path or croak "unlink: $!";
+ }
+ $self->unlink_rev_db_symlink;
+ return;
+ }
my ($log, $ctx) =
- command_output_pipe(qw/rev-list --pretty=raw --reverse/,
- ($head ? "$head.." : "") . $self->refname,
+ command_output_pipe(qw/rev-list --pretty=raw --reverse/,
+ $key_value,
'--');
+ $rebuild_status{$key_value} = 1;
my $metadata_url = $self->metadata_url;
remove_username($metadata_url);
my $svn_uuid = $self->rewrite_uuid || $self->ra_uuid;