[#50466] [ruby-trunk - Bug #7492][Open] Segmentation fault at DL::TestDL#test_call_double on x64 Windows 8 — "phasis68 (Heesob Park)" <phasis@...>

23 messages 2012/12/02

[#50558] [ruby-trunk - Feature #7511][Open] short-circuiting logical implication operator — "rits (First Last)" <redmine@...>

12 messages 2012/12/04

[#50575] [ruby-trunk - Feature #7517][Open] Fixnum::MIN,MAX — "matz (Yukihiro Matsumoto)" <matz@...>

20 messages 2012/12/05

[#50755] Becoming a committer — Charlie Somerville <charlie@...>

Hi ruby-core,

21 messages 2012/12/11
[#50759] Re: Becoming a committer — Yukihiro Matsumoto <matz@...> 2012/12/11

Hi,

[#50784] Re: Becoming a committer — Charles Oliver Nutter <headius@...> 2012/12/11

It's really this easy? If so, I'll send over my public key today :)

[#50795] Re: Becoming a committer — Yukihiro Matsumoto <matz@...> 2012/12/11

Hi,

[#50806] [ruby-trunk - Feature #7548][Open] Load and Require Callbacks — "trans (Thomas Sawyer)" <transfire@...>

12 messages 2012/12/12

[#50810] [ruby-trunk - Feature #7549][Open] A Ruby Design Process — "brixen (Brian Ford)" <brixen@...>

34 messages 2012/12/12

[#50867] [ruby-trunk - Bug #7556][Assigned] test error on refinement — "usa (Usaku NAKAMURA)" <usa@...>

14 messages 2012/12/13

[#50900] [ruby-trunk - Bug #7564][Open] r38175 introduces incompatibility — "tenderlovemaking (Aaron Patterson)" <aaron@...>

14 messages 2012/12/14

[#50951] [ruby-trunk - Bug #7584][Open] Ruby hangs when shutting down an ssl connection in gc finalization — "bpot (Bob Potter)" <bobby.potter@...>

12 messages 2012/12/17

[#51076] [ruby-trunk - Feature #7604][Open] Make === comparison operator ability to delegate comparison to an argument — "prijutme4ty (Ilya Vorontsov)" <prijutme4ty@...>

12 messages 2012/12/22

[ruby-core:50707] [ruby-trunk - Feature #6183] Enumerator::Lazy performance issue

From: "mame (Yusuke Endoh)" <mame@...>
Date: 2012-12-09 11:57:44 UTC
List: ruby-core #50707
Issue #6183 has been updated by mame (Yusuke Endoh).


Sorry, maybe I have no time to review your patch.  Anyone interested?

-- 
Yusuke Endoh <[email protected]>
----------------------------------------
Feature #6183: Enumerator::Lazy performance issue
https://bugs.ruby-lang.org/issues/6183#change-34552

Author: gregolsen (Innokenty Mikhailov)
Status: Assigned
Priority: Low
Assignee: mame (Yusuke Endoh)
Category: 
Target version: 


I benchmarked Enumerator::Lazy and that's what I got:
                 user     system      total        real
Lazy:        0.690000   0.010000   0.700000 (  0.733160)
Normal:      0.160000   0.010000   0.170000 (  0.186695)

It seems like even with 4 chain links and 3000 elements in initial array, Lazy enumerator is almost 4(!) times slower than the normal case.

Instead of performance benefit we've got 4 times performance drawback.

See test file attached.


-- 
http://bugs.ruby-lang.org/

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