undef/git-commit-vandalism
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

git-svn: lazy load some modules

Browse Source 
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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
git-svn.perl
View File

@ -11,14 +11,10 @@ $AUTHOR = 'Eric Wong <normalperson@yhbt.net>';
$VERSION = '@@GIT_VERSION@@';
use Carp qw/croak/;
use Digest::MD5;
use IO::File qw//;
use File::Basename qw/dirname basename/;
use File::Path qw/mkpath/;
use File::Spec;
use File::Find;
use Getopt::Long qw/:config gnu_getopt no_ignore_case auto_abbrev/;
use IPC::Open3;
use Memoize;
use Git::SVN;
@ -298,7 +294,6 @@ my %cmd = (
{} ],
);
use Term::ReadLine;
package FakeTerm;
sub new {
my ($class, $reason) = @_;
@ -313,6 +308,7 @@ package main;
my $term;
sub term_init {
$term = eval {
require Term::ReadLine;
$ENV{"GIT_SVN_NOTTY"}
? new Term::ReadLine 'git-svn', \*STDIN, \*STDOUT
: new Term::ReadLine 'git-svn';
@ -1173,6 +1169,7 @@ sub cmd_branch {
}
::_req_svn();
require SVN::Client;
my $ctx = SVN::Client->new(
config => SVN::Core::config_get_config(
@ -1693,11 +1690,13 @@ sub cmd_reset {
}
sub cmd_gc {
require File::Find;
if (!can_compress()) {
warn "Compress::Zlib could not be found; unhandled.log " .
"files will not be compressed.\n";
}
find({ wanted => \&gc_directory, no_chdir => 1}, "$ENV{GIT_DIR}/svn");
File::Find::find({ wanted => \&gc_directory, no_chdir => 1},
"$ENV{GIT_DIR}/svn");
}
########################### utility functions #########################
@ -2122,6 +2121,7 @@ sub find_file_type_and_diff_status {
sub md5sum {
my $arg = shift;
my $ref = ref $arg;
require Digest::MD5;
my $md5 = Digest::MD5->new();
if ($ref eq 'GLOB' || $ref eq 'IO::File' || $ref eq 'File::Temp') {
$md5->addfile($arg) or croak $!;
@ -2148,6 +2148,7 @@ sub gc_directory {
$gz->gzwrite($str) or
die "Unable to write: ".$gz->gzerror()."!\n";
}
no warnings 'once'; # $File::Find::name would warn
unlink $_ or die "unlink $File::Find::name: $!\n";
} elsif (-f $_ && basename($_) eq "index") {
unlink $_ or die "unlink $_: $!\n";

22
perl/Git/SVN.pm
View File

@ -9,10 +9,8 @@ use vars qw/$_no_metadata
$_use_log_author $_add_author_from $_localtime/;
use Carp qw/croak/;
use File::Path qw/mkpath/;
use File::Copy qw/copy/;
use IPC::Open3;
use Memoize; # core since 5.8.0, Jul 2002
use Memoize::Storable;
use POSIX qw(:signal_h);
use Git qw(
@ -32,11 +30,7 @@ use Git::SVN::Utils qw(
add_path_to_url
);
my $can_use_yaml;
BEGIN {
$can_use_yaml = eval { require Git::SVN::Memoize::YAML; 1};
}
my $memo_backend;
our $_follow_parent = 1;
our $_minimize_url = 'unset';
our $default_repo_id = 'svn';
@ -1578,7 +1572,16 @@ sub tie_for_persistent_memoization {
my $hash = shift;
my $path = shift;
if ($can_use_yaml) {
unless ($memo_backend) {
if (eval { require Git::SVN::Memoize::YAML; 1}) {
$memo_backend = 1;
} else {
require Memoize::Storable;
$memo_backend = -1;
}
}
if ($memo_backend > 0) {
tie %$hash => 'Git::SVN::Memoize::YAML', "$path.yaml";
} else {
tie %$hash => 'Memoize::Storable', "$path.db", 'nstore';
@ -2188,8 +2191,9 @@ sub rev_map_set {
# both of these options make our .rev_db file very, very important
# and we can't afford to lose it because rebuild() won't work
if ($self->use_svm_props || $self->no_metadata) {
require File::Copy;
$sync = 1;
copy($db, $db_lock) or die "rev_map_set(@_): ",
File::Copy::copy($db, $db_lock) or die "rev_map_set(@_): ",
"Failed to copy: ",
"$db => $db_lock ($!)\n";
} else {

3
perl/Git/SVN/Editor.pm
View File

@ -5,7 +5,6 @@ use warnings;
use SVN::Core;
use SVN::Delta;
use Carp qw/croak/;
use IO::File;
use Git qw/command command_oneline command_noisy command_output_pipe
command_input_pipe command_close_pipe
command_bidi_pipe command_close_bidi_pipe/;
@ -586,7 +585,7 @@ The interface will change as git-svn evolves.
=head1 DEPENDENCIES
Subversion perl bindings,
the core L<Carp> and L<IO::File> modules,
the core L<Carp> module,
and git's L<Git> helper module.
C<Git::SVN::Editor> has not been tested using callers other than

3
perl/Git/SVN/Fetcher.pm
View File

@ -7,7 +7,6 @@ use warnings;
use SVN::Delta;
use Carp qw/croak/;
use File::Basename qw/dirname/;
use IO::File qw//;
use Git qw/command command_oneline command_noisy command_output_pipe
command_input_pipe command_close_pipe
command_bidi_pipe command_close_bidi_pipe/;
@ -600,7 +599,7 @@ developing git-svn.
=head1 DEPENDENCIES
L<SVN::Delta> from the Subversion perl bindings,
the core L<Carp>, L<File::Basename>, and L<IO::File> modules,
the core L<Carp> and L<File::Basename> modules,
and git's L<Git> helper module.
C<Git::SVN::Fetcher> has not been tested using callers other than

5
perl/Git/SVN/Ra.pm
View File

@ -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;