add Sartak's moose_bench.pl script to benchmarks/

diff --git a/benchmarks/moose_bench.pl b/benchmarks/moose_bench.pl
new file mode 100644 (file)
index 0000000..9f22a54
--- /dev/null
+++ b/benchmarks/moose_bench.pl
@@ -0,0 +1,106 @@
+#!/usr/bin/env perl
+use strict;
+use warnings;
+use Time::HiRes 'time';
+use List::Util 'sum';
+use IPC::System::Simple 'system';
+use autodie;
+use Parse::BACKPAN::Packages;
+use LWP::Simple;
+use Archive::Tar;
+use File::Slurp 'slurp';
+
+my $backpan = Parse::BACKPAN::Packages->new;
+my @cmops   = $backpan->distributions('Class-MOP');
+my @mooses  = $backpan->distributions('Moose');
+
+my $cmop_version = 0;
+my $cmop_dir;
+
+my $base = "http://backpan.cpan.org/";
+
+for my $moose (@mooses) {
+    my $moose_dir = build($moose);
+
+    # Find the CMOP dependency
+    my $makefile = slurp("$moose_dir/Makefile.PL");
+    my ($cmop_dep) = $makefile =~ /Class::MOP.*?([0-9._]+)/
+        or die "Unable to find Class::MOP version dependency in $moose_dir/Makefile.PL";
+
+    # typo?
+    $cmop_dep = '0.64_07' if $cmop_dep eq '0.6407';
+
+    # nonexistent dev releases?
+    $cmop_dep = '0.79' if $cmop_dep eq '0.78_02';
+    $cmop_dep = '0.83' if $cmop_dep eq '0.82_01';
+
+    bump_cmop($cmop_dep, $moose);
+
+    warn "Building $moose_dir";
+    eval {
+        system("(cd '$moose_dir' && '$^X' '-I$cmop_dir/lib' Makefile.PL && make && sudo make install) >/dev/null");
+
+        my @times;
+        for (1 .. 5) {
+            my $start = time;
+            system(
+                $^X,
+                "-I$moose_dir/lib",
+                "-I$cmop_dir/lib",
+                '-e', 'package Class; use Moose;',
+            );
+            push @times, time - $start;
+        }
+
+        my $duration = sum(@times) / @times;
+        my $mem = qx[$^X -I$moose_dir/lib -I$cmop_dir/lib -MGTop -e 'my (\$gtop, \$before); BEGIN { \$gtop = GTop->new; \$before = \$gtop->proc_mem(\$\$)->size; } package Class; use Moose; print \$gtop->proc_mem(\$\$)->size - \$before'];
+        printf "%7s: %0.4f (%s), %d bytes\n",
+            $moose->version,
+            $duration,
+            join(', ', map { sprintf "%0.4f", $_ } @times),
+            $mem;
+    };
+    warn $@ if $@;
+}
+
+sub bump_cmop {
+    my $expected = shift;
+    my $moose = shift;
+
+    return $cmop_dir if $cmop_version eq $expected;
+
+    my @orig_cmops = @cmops;
+    shift @cmops until !@cmops || $cmops[0]->version eq $expected;
+
+    die "Ran out of cmops, wanted $expected for "
+        . $moose->distvname
+        . " (had " . join(', ', map { $_->version } @orig_cmops) . ")"
+            if !@cmops;
+
+    $cmop_version = $cmops[0]->version;
+    $cmop_dir = build($cmops[0]);
+
+    warn "Building $cmop_dir";
+    system("(cd '$cmop_dir' && '$^X' Makefile.PL && make && sudo make install) >/dev/null");
+
+    return $cmop_dir;
+}
+
+sub build {
+    my $dist = shift;
+    my $distvname = $dist->distvname;
+    return $distvname if -d $distvname;
+
+    warn "Downloading $distvname";
+    my $tarball = get($base . $dist->prefix);
+    open my $handle, '<', \$tarball;
+
+    my $tar = Archive::Tar->new;
+    $tar->read($handle);
+    $tar->extract;
+
+    my ($arbitrary_file) = $tar->list_files;
+    (my $directory = $arbitrary_file) =~ s{/.*}{};
+    return $directory;
+}
+