[#56982] [ruby-trunk - Bug #8854][Open] Update URL for bug reports — "stomar (Marcus Stollsteimer)" <redmine@...>
7 messages
2013/09/03
[#57038] [ruby-trunk - Feature #3620] Add Queue, SIzedQueue and ConditionVariable implementations in C in addition to ruby ones — "Glass_saga (Masaki Matsushita)" <glass.saga@...>
4 messages
2013/09/05
[#57040] Re: [ruby-trunk - Feature #3620] Add Queue, SIzedQueue and ConditionVariable implementations in C in addition to ruby ones
— SASADA Koichi <ko1@...>
2013/09/05
(2013/09/05 20:52), Glass_saga (Masaki Matsushita) wrote:
[#57058] [ruby-trunk - Bug #8875][Open] Select is not usable with SSLSocket — "headius (Charles Nutter)" <headius@...>
11 messages
2013/09/07
[#57092] [ruby-trunk - Bug #8883][Open] Rational canonicalization unexpectedly converts to Fixnum — "melquiades (Paul Cantrell)" <cantrell@...>
16 messages
2013/09/09
[#57111] [ruby-trunk - Feature #8887][Open] min(n), max(n), min_by(n), max_by(n) — "akr (Akira Tanaka)" <akr@...>
13 messages
2013/09/10
[#57117] [ruby-trunk - Feature #8890][Open] [PATCH] Eliminate less-than-zero checks for unsigned variables — "tonyo (Anton Ovchinnikov)" <revolver112@...>
5 messages
2013/09/10
[#57134] [CommonRuby - Feature #8896][Open] #tap with missing block — "prijutme4ty (Ilya Vorontsov)" <prijutme4ty@...>
5 messages
2013/09/11
[#57138] [ruby-trunk - Feature #8897][Open] client side TCP fast open — "Glass_saga (Masaki Matsushita)" <glass.saga@...>
5 messages
2013/09/11
[#57195] [ruby-trunk - Feature #8897][Assigned] client side TCP fast open
— "Glass_saga (Masaki Matsushita)" <glass.saga@...>
2013/09/14
[#57186] [ruby-trunk - Feature #8909][Open] Expand "f" frozen suffix to literal arrays and hashes — "headius (Charles Nutter)" <headius@...>
37 messages
2013/09/14
[#57224] [ruby-trunk - Feature #8909] Expand "f" frozen suffix to literal arrays and hashes
— "headius (Charles Nutter)" <headius@...>
2013/09/15
[#57262] [ruby-trunk - Feature #8921][Open] Allow select, reject, etc to accept a regex — "kyledecot (Kyle Decot)" <kyle.decot@...>
13 messages
2013/09/18
[#57264] [ruby-trunk - Feature #8921] Allow select, reject, etc to accept a regex
— "kyledecot (Kyle Decot)" <kyle.decot@...>
2013/09/18
[#57265] Re: [ruby-trunk - Feature #8921] Allow select, reject, etc to accept a regex
— Fuad Saud <fuadksd@...>
2013/09/18
Shouldn't select/reject use threequals?
[#57292] [ruby-trunk - Feature #8931][Open] Update URL in REPORTBUG_MSG — "zzak (Zachary Scott)" <e@...>
4 messages
2013/09/20
[#57315] [ruby-trunk - Feature #8938][Open] it keyword — "Sing9898 (Sing Lou)" <3b06e8d4@...>
5 messages
2013/09/23
[#57367] [ruby-trunk - Feature #8951][Open] Please add a hash-to-hash alternative of the map method to Hash — "behrangsa (Behrang Saeedzadeh)" <behrangsa@...>
8 messages
2013/09/25
[#57385] [ruby-trunk - Bug #8953][Open] `str =~ /pattern/` does not call =~ method if (1) str is a String, (2) /pattern/ is a Regexp literal — "gfx (Goro Fuji)" <gfuji@...>
12 messages
2013/09/26
[#57394] [ruby-trunk - Bug #8955][Open] LocalJumpError - no block given (yield) after implementation of class hierarchy method cache invalidation — "mfla (Morten Fla)" <mmflaa@...>
4 messages
2013/09/26
[#57462] [ruby-trunk - misc #8962][Open] [DOC] add step to enable Generational GC merits in README.EXT* — "tad (Tadashi Saito)" <redmine@...>
6 messages
2013/09/28
[ruby-core:57435] [ruby-trunk - Bug #8208][Rejected] Raise cached exceptions for nonblocking IO to avoid allocation/stack-copying costs
From:
"headius (Charles Nutter)" <headius@...>
Date:
2013-09-27 11:15:25 UTC
List:
ruby-core #57435
Issue #8208 has been updated by headius (Charles Nutter). Status changed from Open to Rejected https://bugs.ruby-lang.org/issues/5138 has been accepted in a slightly altered form, so I think perhaps this can be rejected. Since it is now possible to use read_nonblock with no exception raise, my proposal is unnecessary. ---------------------------------------- Bug #8208: Raise cached exceptions for nonblocking IO to avoid allocation/stack-copying costs https://bugs.ruby-lang.org/issues/8208#change-42041 Author: headius (Charles Nutter) Status: Rejected Priority: Normal Assignee: Category: Target version: ruby -v: 2.0.0 Backport: Currently, all nonblocking IO APIs raise exceptions when the IO channel cannot perform the requested read or write without blocking. This adds a tremendous performance hit to nonblocking IO, since raising an exception requires both allocating the exception object and saving off the backtrace information from the call stack. Two changes could reduce this cost: 1. Don't provide a full backtrace for these exceptions, or only provide it in a debug or verbose modes. 99% of the rescuers of these exceptions don't ever use the backtrace, so it's wasted overhead. 2. Always raise a cached exception. This completely avoids all allocation costs for nonblocking operations that fail. JRuby does #1 in JRuby 1.7 series, but does not do #2. I will work on a patch for MRI to do both #1 and #2. The benefit of this change would be that nonblocking IO has zero wasted overhead. The down side would be that the exceptions raised do not have a useful backtrace unless debug or verbose. If we did this change, we would not have to introduce a separate API for nonblocking IO that doesn't raise exceptions. Thoughts? -- http://bugs.ruby-lang.org/