From 976c689ad478b8010b053aa270a28bd236b8380e Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@ruby-lang.org>
Date: Mon, 10 Jun 2019 21:07:24 +0900
Subject: irb: defer requiring rdoc to improve the start up time

---
 lib/irb/completion.rb | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'lib/irb/completion.rb')

diff --git a/lib/irb/completion.rb b/lib/irb/completion.rb
index 26d672847c..f75dd0ebcd 100644
--- a/lib/irb/completion.rb
+++ b/lib/irb/completion.rb
@@ -8,7 +8,7 @@
 #
 
 require "readline"
-require "rdoc"
+autoload :RDoc, "rdoc"
 
 module IRB
   module InputCompletor # :nodoc:
@@ -267,8 +267,8 @@ module IRB
       end
     end
 
-    RDocRIDriver = RDoc::RI::Driver.new
     PerfectMatchedProc = ->(matched) {
+      RDocRIDriver ||= RDoc::RI::Driver.new
       if matched =~ /\A(?:::)?RubyVM/ and not ENV['RUBY_YES_I_AM_NOT_A_NORMAL_USER']
         File.open(File.join(__dir__, 'ruby_logo.aa')) do |f|
           RDocRIDriver.page do |io|
-- 
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