* lib/delegate.rb: Remove backtrace cleaning for delegated methods

  This patch was provided by Rafael França and greatly improves
  performance when an exception is raised. [Bug #11461]

  Before:
    Calculating -------------------------------------
             default    86.209k i/100ms
     default raising     2.209k i/100ms
    -------------------------------------------------
             default      1.953M (±11.0%) i/s -      9.655M
     default raising     21.826k (±13.5%) i/s -    108.241k

  After:
    Calculating -------------------------------------
             default    72.211k i/100ms
     default raising    34.288k i/100ms
    -------------------------------------------------
             default      2.013M (±18.7%) i/s -      9.460M
     default raising    623.950k (± 9.7%) i/s -      3.120M

  Benchmark:
    require 'delegate'
    require 'benchmark/ips'

    class Foo
      def name
        'foo'
      end

      def bla
        raise
      end
    end

    class Bar < DelegateClass(Foo)
    end

    bar = Bar.new(Foo.new)

    Benchmark.ips do |b|
      b.report('default') { bar.name }
      b.report('default raising') { bar.bla rescue nil }
    end


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@51806 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 6 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index ebaf43fb0a..c96c8780bf 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+Wed Sep  9 11:08:59 2015  Zachary Scott  <zzak@ruby-lang.org>
+
+	* lib/delegate.rb: Remove backtrace cleaning for delegated methods
+          This patch was provided by Rafael França and greatly improves
+          performance when an exception is raised. [Bug #11461]
+
 Wed Sep  9 10:05:41 2015  SHIBATA Hiroshi  <hsbt@ruby-lang.org>
 
 	* test/rubygems/test_config.rb: fix broken tests for Windows platform.