I modified the application and created two more versions of it
The new results that I got are:
Threads JRuby-Java JRuby-Java Pure JRuby Java
No engine with Engine with jruby
command
========================================================
5 38.42 39.12 40.48
31.20
10 63.90 65.65 60.98
31.94
15 89.87 88.05 50.31
31.41
20 100.79 77.41 53.15
31.42
25 100.04 115.58 48.12
32.66
The additional VM arguments used with all these versions are:
-server -XX:+UseParallelGC -Xmx768M -Xms768M -Xmn512M
-J-Djruby.objectspace.enabled=false -J-Djruby.thread.pooling=true
Download all the three versions here:
http://www.nabble.com/file/p21310749/MultiThreadedDemo.zip
MultiThreadedDemo.zip
In the first modification (JRuby-Java no engine) I removed the dependency on
JRubyScriptEngine and ran the application by using the jruby command.
The second version was a pure ruby implementation without any .java files. I
ran the application with jruby command
What is surprising is that the pure ruby implementation manages to performs
almost at the same level even when the number of threads are increased. I
performed the test with the pure ruby implementation and went upto 100
threads. Even at this load the numbers remained almost the same.
It is noticeable that the pure ruby implementation is slower that the pure
java implementation. However, what is of interest to me is the ability of
the pure ruby implementation to keep performing at the same level even when
the number of threads are increased.
As I had mentioned in my first post in the thread that the actual
application I am trying to write involves some legacy Java code being
invoked by the ruby scripts using JRuby. This application will be deployed
in tomcat and will invoke the ruby scripts using JRubyScriptEngine.
I want to improve the performance of my application keeping these
requirements in mind.
Though I may be wrong, but from the numbers it looks like there is an issue
in the Java-Ruby or Ruby-Java interaction. Any suggestions regarding this
would be of great help.
I would be happy to contribute any fixes/optimizations to solve this problem
--
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http://www.nabble.com/Major-performance-slowdown-while-multithreading-%28Java-Vs-JRuby%29-tp21053077p21310749.html
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