gitweb: Add optional "time to generate page" info in footer

diff --git a/gitweb/gitweb.perl b/gitweb/gitweb.perl
index 2cb60bedc65be8cdf43b9c0691a8a81e0a8f8cb4..18cbf35391d8cedc0b6c8303b350eb14878fd4ed 100755 (executable)
--- a/gitweb/gitweb.perl
+++ b/gitweb/gitweb.perl
@@ -18,6 +18,12 @@
 use File::Basename qw(basename);
 binmode STDOUT, ':utf8';
 
+our $t0;
+if (eval { require Time::HiRes; 1; }) {
+       $t0 = [Time::HiRes::gettimeofday()];
+}
+our $number_of_git_cmds = 0;
+
 BEGIN {
        CGI->compile() if $ENV{'MOD_PERL'};
 }
@@ -394,6 +400,13 @@ BEGIN
                'sub' => \&feature_avatar,
                'override' => 0,
                'default' => ['']},
+
+       # Enable displaying how much time and how many git commands
+       # it took to generate and display page.  Disabled by default.
+       # Project specific override is not supported.
+       'timed' => {
+               'override' => 0,
+               'default' => [0]},
 );
 
 sub gitweb_get_feature {
@@ -507,6 +520,7 @@ sub filter_snapshot_fmts {
 
 # version of the core git binary
 our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
+$number_of_git_cmds++;
 
 $projects_list ||= $projectroot;
 
@@ -1955,6 +1969,7 @@ sub get_feed_info {
 
 # returns path to the core git executable and the --git-dir parameter as list
 sub git_cmd {
+       $number_of_git_cmds++;
        return $GIT, '--git-dir='.$git_dir;
 }
 
@@ -3205,6 +3220,20 @@ sub git_footer_html {
        }
        print "</div>\n"; # class="page_footer"
 
+       if (defined $t0 && gitweb_check_feature('timed')) {
+               print "<div id=\"generating_info\">\n";
+               print 'This page took '.
+                     '<span id="generating_time" class="time_span">'.
+                     Time::HiRes::tv_interval($t0, [Time::HiRes::gettimeofday()]).
+                     ' seconds </span>'.
+                     ' and '.
+                     '<span id="generating_cmd">'.
+                     $number_of_git_cmds.
+                     '</span> git commands '.
+                     " to generate.\n";
+               print "</div>\n"; # class="page_footer"
+       }
+
        if (-f $site_footer) {
                insert_file($site_footer);
        }