From 52fddcc653458456f98b3683dffd781cf00b35fe Mon Sep 17 00:00:00 2001
From: Sean Griffin <sean@thoughtbot.com>
Date: Tue, 18 Nov 2014 13:40:03 -0800
Subject: [PATCH] Speed up integer casting from DB

We don't have the check the range when the value is coming from the DB,
so override type_cast_from_database to short-circuit the extra work.
The difference is huge but the absolute gain is quite small. That being
said this is a hotspot and it showed up on the radar when benchmarking
discourse.
---
 activerecord/lib/active_record/type/integer.rb | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/activerecord/lib/active_record/type/integer.rb b/activerecord/lib/active_record/type/integer.rb
index d69e5b3f28..36bbd9cd5e 100644
--- a/activerecord/lib/active_record/type/integer.rb
+++ b/activerecord/lib/active_record/type/integer.rb
@@ -14,6 +14,11 @@ module ActiveRecord
 
       alias type_cast_for_database type_cast
 
+      def type_cast_from_database(value)
+        return if value.nil?
+        value.to_i
+      end
+
       protected
 
       attr_reader :range