[ruby-core:53988] Re: [ruby-trunk - Bug #8211] Performance regression of method calls

Is your platform 32bit? Than it is cause of -fPIE


2013/4/4 bitsweat (Jeremy Kemper) <[e-mail]>

>
> Issue #8211 has been updated by bitsweat (Jeremy Kemper).
>
>
> David, this looks a lot like the CFLAGS issues folks were hitting with
> rvm. Essentially, getting unoptimized Ruby builds.
>
> Take a close look at the differences in RbConfig::CONFIG between your Ruby
> builds.
>
> ruby -e 'puts RUBY_DESCRIPTION, RbConfig::CONFIG["cflags"],
> RbConfig::CONFIG["CFLAGS"]'
>
> How did you build Ruby?
> ----------------------------------------
> Bug #8211: Performance regression of method calls
> https://bugs.ruby-lang.org/issues/8211#change-38202
>
> Author: dunric (David Unric)
> Status: Open
> Priority: Normal
> Assignee:
> Category: core
> Target version:
> ruby -v: 2.0.0p0
>
>
> There are significant performance regressions in the newer Ruby versions.
> When compared to the last 1.9 patch build, method & lambda calls are about
> 3 times slower !
>
> Benchmarking results:
> _____________________________________________________________
> Ruby 1.9.3p392
>        user     system      total        real
> lambda:  8.310000   0.000000   8.310000 (  8.315247)
> instance method:  5.210000   0.000000   5.210000 (  5.219299)
> class method:  5.040000   0.000000   5.040000 (  5.037483)
>
> Ruby 2.0.0-p0
>        user     system      total        real
> lambda: 25.310000   0.010000  25.320000 ( 25.339897)
> instance method: 17.870000   0.000000  17.870000 ( 17.882656)
> class method: 17.630000   0.010000  17.640000 ( 17.650515)
>
> Ruby 2.1.0-dev
>        user     system      total        real
> lambda: 19.210000   0.000000  19.210000 ( 19.227314)
> instance method: 13.930000   0.000000  13.930000 ( 13.936974)
> class method: 14.000000   0.000000  14.000000 ( 14.001582)
> _____________________________________________________________
>
>
> The code:
> _____________________________________________________________
> require 'benchmark'
>
> do_custom_stuff = lambda { 1 + 1 + 1 }
>
> class CustomStuff
>   def self.do
>     1 + 1 + 1
>   end
>
>   def do
>     1 + 1 + 1
>   end
> end
>
> custom_stuff = CustomStuff.new
>
> Benchmark.bm { |b|
>    MANY = 50_000_000
>    b.report("lambda:")          { MANY.times { do_custom_stuff.call }}
>    b.report("instance method:") { MANY.times { custom_stuff.do      }}
>    b.report("class method:")    { MANY.times { CustomStuff.do       }}
> }
> _____________________________________________________________
>
>
> --
> http://bugs.ruby-lang.org/
>
>