From 383e5e538cbab5f20cf6742ec1ea5d2c2f81c5ea Mon Sep 17 00:00:00 2001
From: Hubert depesz Lubaczewski <depesz@depesz.com>
Date: Fri, 19 Feb 2021 14:52:03 +0100
Subject: [PATCH] Display JIT info for plans

---
 cpanfile                          |  2 +-
 public/css/common.css             | 19 ++++++++++++++
 templates/controller/show.html.ep | 42 ++++++++++++++++++++++++++++++-
 3 files changed, 61 insertions(+), 2 deletions(-)

diff --git a/cpanfile b/cpanfile
index 58facc9..54af80c 100644
--- a/cpanfile
+++ b/cpanfile
@@ -18,6 +18,6 @@ requires 'Encode';
 requires 'English';
 requires 'File::Spec';
 requires 'Mojolicious';
-requires 'Pg::Explain', '>= 0.90';
+requires 'Pg::Explain', '>= 1.05';
 
 # vim: set ft=perl:
diff --git a/public/css/common.css b/public/css/common.css
index 41534d5..f6314e9 100755
--- a/public/css/common.css
+++ b/public/css/common.css
@@ -256,3 +256,22 @@ section p a:hover   {background:#234;color:#fff;border:1px solid #123}
 #trigger-times tr.c-2 {background-color:#fe8 !important}
 #trigger-times tr.c-3 {background-color:#e80 !important;color:#fff}
 #trigger-times tr.c-4 {background-color:#800 !important;color:#fff}
+
+#jit-info {margin: 1em 0px;background: #eee;}
+#jit-info thead a { border: 1px solid black; font-size: 0.5em; float: right; padding: 0.3em; }
+#jit-info,
+#jit-info th,
+#jit-info td {border-collapse: collapse; border:1px solid #ccc;}
+#jit-info .jit-timing th,
+#jit-info .jit-option th {padding-left: 1.5em; padding-right: 1em;}
+#jit-info .jit-option td {text-align: center;}
+#jit-info .jit-option td span {font-size: 1.2em; font-weight: bold;}
+#jit-info th { font-size: 1.2em; font-weight: bold; padding: 0.2em 0.5em;}
+#jit-info thead th {text-align: center}
+#jit-info th.top {font-size: 1.5em;}
+#jit-info td {text-align: right; padding: 0.2em 0.5em;}
+#jit-info .jit-fun td {text-align: center;}
+#jit-info span.value { font-size: 1.2em; }
+#jit-info tr.c-2 {background-color:#fe8 !important}
+#jit-info tr.c-3 {background-color:#e80 !important;color:#fff}
+#jit-info tr.c-4 {background-color:#800 !important;color:#fff}
diff --git a/templates/controller/show.html.ep b/templates/controller/show.html.ep
index e9fc291..d27babf 100755
--- a/templates/controller/show.html.ep
+++ b/templates/controller/show.html.ep
@@ -572,6 +572,46 @@
 </table>
 % }
 
+% if (defined $explain->jit) {
+%   my $full_execution_time = $explain->runtime || 0;
+<table id="jit-info">
+    <thead>
+        <tr><th colspan="2" class="top" title="Just-in-Time Compilation">JIT:<a href="https://www.postgresql.org/docs/current/jit.html" target='_new'>?</a></th></tr>
+    </thead>
+    <tbody>
+        <tr class="jit-fun"><th>Functions:</th><td><%= $explain->jit->functions %></td></tr>
+
+        <tr><th colspan="2">Options:</th></tr>
+        % my $opts = $explain->jit->options;
+        % for my $name ( sort keys %{ $opts } ) {
+            <tr class="jit-option">
+                <th><%= $name %></th>
+                <td>
+                    % if ( $opts->{$name} ) {
+                        <span>&check;</span> (true)
+                    % } else {
+                        <span>&cross;</span> (false)
+                    % }
+                </td>
+            </tr>
+        % }
+
+        <tr><th colspan="2">Timing:</th></tr>
+        % my $ts = $explain->jit->timings;
+        % for my $name ( sort keys %{ $ts } ) {
+            % my $row_color = 1;
+            % if ( $full_execution_time ) {
+                % my $t_point = $ts->{$name} / $full_execution_time;
+                % if ( $t_point > 0.9 )    { $row_color = 4; }
+                % elsif ( $t_point > 0.5 ) { $row_color = 3; }
+                % elsif ( $t_point > 0.1 ) { $row_color = 2; }
+            % }
+            <tr class="jit-timing c-<%= $row_color %>"><th><%= $name %></th><td><%= commify_number( $ts->{$name} ) %> ms</td></tr>
+        % }
+    </tbody>
+</table>
+% }
+
 % if ( defined $explain->trigger_times ) {
 %   my $full_execution_time = $explain->runtime || 0;
 <table id="trigger-times">
@@ -591,7 +631,7 @@
         <tr class="c-<%= $row_color %>">
                 <th class="name"><%= $trg->{'name'} %></th>
                 <td class="time"><span class="value"><%= commify_number( sprintf '%.03f', $trg->{'time'} ) %></span> <span class="unit">ms</span></td>
-                <td class="count"><span class="value"><%= $trg->{'calls'} %></span></td>
+                <td class="count"><span class="value"><%= commify_number( $trg->{'calls'} ) %></span></td>
                 <td class="time"><span class="value"><%= commify_number( sprintf '%.03f', $trg->{'time'} / $trg->{'calls'} ) %></span> <span class="unit">ms</span></td>
             </tr>
         % }