From: Reid Thompson <reid.thompson@...>
Date: 2009-08-20T04:11:49+09:00
Subject: Re: Confirm my Performance Test Against Java?

Robert Klemme wrote:
> On 19.08.2009 15:31, Ben Christensen wrote:
> 
>> http://benjchristensen.com/2009/08/18/initial-impressions-on-ruby-performance/ 
>>
> 
> 1.9* is significantly better.  I did not try JRuby yet.
> 
> robert@fussel /cygdrive/c/Temp/frp
> $ /cygdrive/c/Programme/Java/jdk1.6.0_14/bin/javac FileReadParse.java
> 
> robert@fussel /cygdrive/c/Temp/frp
> $ java -cp . FileReadParse
> Starting to read file...
> The number of tokens is: 1122
> It took 16 ms
> 
> robert@fussel /cygdrive/c/Temp/frp
> $ allruby file_read_parse.rb
> ruby 1.8.7 (2008-08-11 patchlevel 72) [i386-cygwin]
> Starting to read file ...
> The number of tokens is: 1122
> It took 3.0 ms
> ruby 1.9.1p129 (2009-05-12 revision 23412) [i386-cygwin]
> Starting to read file ...
> The number of tokens is: 1122
> It took 2.0 ms
> 
> robert@fussel /cygdrive/c/Temp/frp
> $ wc file_test.txt
>  190 1114 7579 file_test.txt
> 
> robert@fussel /cygdrive/c/Temp/frp
> $
> 
> 
> ====================================================================
> 
> 
> robert@fussel /cygdrive/c/Temp/frp
> $ !w
> wc file_test.txt x
>   95000  557000 3789500 file_test.txt
>   68970  404382 2751177 x
>  163970  961382 6540677 insgesamt
> 
> robert@fussel /cygdrive/c/Temp/frp
> $ java -cp . FileReadParse
> Starting to read file...
> The number of tokens is: 561000
> It took 359 ms
> 
> robert@fussel /cygdrive/c/Temp/frp
> $ !a
> allruby file_read_parse.rb
> ruby 1.8.7 (2008-08-11 patchlevel 72) [i386-cygwin]
> Starting to read file ...
> The number of tokens is: 561000
> It took 1395.0 ms
> ruby 1.9.1p129 (2009-05-12 revision 23412) [i386-cygwin]
> Starting to read file ...
> The number of tokens is: 561000
> It took 872.0 ms
> 
> robert@fussel /cygdrive/c/Temp/frp
> 
> robert@fussel /cygdrive/c/Temp/frp
> $ /cygdrive/c/Programme/Java/jdk1.6.0_14/bin/java -server -cp . 
> FileReadParse
> Starting to read file...
> The number of tokens is: 561000
> It took 515 ms
> 
> robert@fussel /cygdrive/c/Temp/frp
> $
> 
> Cheers
> 
>     robert
> 
$ java FileReadParse
Starting to read file...
The number of tokens is: 284717
It took 333 ms
rthompso@raker>~ 

$ ruby wcinline.rb  uscities.txt
Starting to read file ...
   284717
It took 211.72 ms
rthompso@raker>~ 

$ time wc uscities.txt
  141989  284717 7449038 uscities.txt

real    0m0.333s
user    0m0.307s
sys     0m0.006s

$ java -version
java version "1.6.0_15"
Java(TM) SE Runtime Environment (build 1.6.0_15-b03)
Java HotSpot(TM) Server VM (build 14.1-b02, mixed mode)

$ ruby -v
ruby 1.8.7 (2009-06-12 patchlevel 174) [i686-linux]

Not sure how Gentoo handles the java, but all other exes on the box are compiled
CFLAGS="-march=prescott -O2 -g -pipe" with splitdebug enabled
dual core
Linux raker 2.6.30-gentoo-r4 #2 SMP PREEMPT Wed Aug 5 11:51:00 EDT 2009 i686 
Intel(R) Core(TM)2 CPU 6320 @ 1.86GHz GenuineIntel GNU/Linux


wcinline.rb quickly hacked from 
http://en.literateprograms.org/Special:Downloadcode/Word_count_%28C%29
and 
http://github.com/remogatto/ffi-inliner/blob/90481c869d9fc0778e12218d3ffa83e3f823acaf/examples/ex_1.rb

$ cat wcinline.rb
require 'ffi-inliner'

module MyLib
     extend Inliner
     inline '#include <stdio.h>
     #include<ctype.h>

     int n;

     void wc(const char *fname)
     {
         int ch;
         int chars=0;
         int words=0;
         int lines=0;
         int sp=1;
         FILE *fp;

         if(fname[0]!=055) fp=fopen(fname, "r");
         else fp=stdin;
             if(!fp) return -1;

                 while((ch=getc(fp))!=EOF) {
                     if(isspace(ch)) sp=1;
                     else if(sp) {
                         ++words;
                         sp=0;
                     }
                 }

                 if(fname[0]!=055) fclose(fp);

        printf("% 8d\n", words);
     }'
end

class Foo
     include MyLib
end

# get the start time
start = Time.now

puts "Starting to read file ..."

Foo.new.wc(ARGV[0])

puts "It took " + ((Time.now-start)*1000).to_s + " ms"