JRuby

performance drop with threadsafe autoloading for JRuby 1.6.6.

Details

  • Type: Bug Bug
  • Status: Resolved Resolved
  • Priority: Blocker Blocker
  • Resolution: Fixed
  • Affects Version/s: JRuby 1.6.6, JRuby 1.6.7
  • Fix Version/s: JRuby 1.6.8
  • Component/s: Core Classes/Modules, Performance, Ruby 1.8.7
  • Labels:
    None
  • Environment:
    not OS related. We reproduced this on a Mac OSX Snow Leopard
  • Testcase included:
    yes
  • Number of attachments :
    2

Description

With the d9426515f8497c635d3aeebdc8d12c6105bf6ab8 changeset we see about 20-25% drop in performance for a specific case where objects extend a module via active_support/core_ext/object/metaclass.

We have a ruby test script is attached to allow you to reproduce the problem. We ran our test script against 1.6.7 and 1.6.7 with the d94265 changeset removed and saw 20% performance improvement.

Attached files:

  • autoload_bug.zip: a test script to reproduce performance issue, run test.rb
  • debug.patch: there are some debug output patched to 1.6.7 branch, and if you built a complete jar with this patch, and run the test, you should see that class C is never mark as autoloaded.

Activity

Ascending order - Click to sort in descending order
Charles Oliver Nutter made changes -
Field Original Value New Value
Status Open [ 1 ] Resolved [ 5 ]
Assignee Charles Oliver Nutter [ headius ]
Fix Version/s JRuby 1.7 [ 17049 ]
Resolution Fixed [ 1 ]
Hiroshi Nakamura made changes -
Resolution Fixed [ 1 ]
Status Resolved [ 5 ] Reopened [ 4 ]
Assignee Charles Oliver Nutter [ headius ] Hiroshi Nakamura [ nahi ]
Hiroshi Nakamura made changes -
Status Reopened [ 4 ] Resolved [ 5 ]
Fix Version/s JRuby 1.6.8 [ 18345 ]
Fix Version/s JRuby 1.7 [ 17049 ]
Resolution Fixed [ 1 ]

People

  • Assignee:
    Hiroshi Nakamura
    Reporter:
    Li Xiao
Vote (1)
Watch (0)

Dates

  • Created:
    Updated:
    Resolved: