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* [Bug libgcj/25934] New: fast instanceof checking
@ 2006-01-23 23:31 tromey at gcc dot gnu dot org
2006-01-24 0:46 ` [Bug libgcj/25934] " pinskia at gcc dot gnu dot org
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: tromey at gcc dot gnu dot org @ 2006-01-23 23:31 UTC (permalink / raw)
To: java-prs
instanceof (and checkcast, etc) are fairly slow in gcj currently.
Here are a couple of papers on the topic of speeding this up:
http://lambda-the-ultimate.org/node/view/1218
http://people.csail.mit.edu/jrb/pve/index.htm
--
Summary: fast instanceof checking
Product: gcc
Version: 4.1.0
Status: UNCONFIRMED
Severity: enhancement
Priority: P3
Component: libgcj
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: tromey at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25934
^ permalink raw reply [flat|nested] 4+ messages in thread* [Bug libgcj/25934] fast instanceof checking 2006-01-23 23:31 [Bug libgcj/25934] New: fast instanceof checking tromey at gcc dot gnu dot org @ 2006-01-24 0:46 ` pinskia at gcc dot gnu dot org 2006-03-15 20:26 ` tromey at gcc dot gnu dot org 2006-12-07 18:37 ` tromey at gcc dot gnu dot org 2 siblings, 0 replies; 4+ messages in thread From: pinskia at gcc dot gnu dot org @ 2006-01-24 0:46 UTC (permalink / raw) To: java-prs ------- Comment #1 from pinskia at gcc dot gnu dot org 2006-01-24 00:46 ------- Confirmed. -- pinskia at gcc dot gnu dot org changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |NEW Ever Confirmed|0 |1 Last reconfirmed|0000-00-00 00:00:00 |2006-01-24 00:46:17 date| | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25934 ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug libgcj/25934] fast instanceof checking 2006-01-23 23:31 [Bug libgcj/25934] New: fast instanceof checking tromey at gcc dot gnu dot org 2006-01-24 0:46 ` [Bug libgcj/25934] " pinskia at gcc dot gnu dot org @ 2006-03-15 20:26 ` tromey at gcc dot gnu dot org 2006-12-07 18:37 ` tromey at gcc dot gnu dot org 2 siblings, 0 replies; 4+ messages in thread From: tromey at gcc dot gnu dot org @ 2006-03-15 20:26 UTC (permalink / raw) To: java-prs ------- Comment #2 from tromey at gcc dot gnu dot org 2006-03-15 20:26 ------- Now I think we don't need to do anything here. We already handle the common cases. For instance, if the target is an interface we will use the IDT to do this test. This is reasonably fast. Also if both classes in question are concrete, we will use the 'ancestors' array to do a constant-time check. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25934 ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug libgcj/25934] fast instanceof checking 2006-01-23 23:31 [Bug libgcj/25934] New: fast instanceof checking tromey at gcc dot gnu dot org 2006-01-24 0:46 ` [Bug libgcj/25934] " pinskia at gcc dot gnu dot org 2006-03-15 20:26 ` tromey at gcc dot gnu dot org @ 2006-12-07 18:37 ` tromey at gcc dot gnu dot org 2 siblings, 0 replies; 4+ messages in thread From: tromey at gcc dot gnu dot org @ 2006-12-07 18:37 UTC (permalink / raw) To: java-prs ------- Comment #3 from tromey at gcc dot gnu dot org 2006-12-07 18:37 ------- Nothing to do -- not sure why I didn't close it earlier. -- tromey at gcc dot gnu dot org changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution| |INVALID http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25934 ^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2006-12-07 18:37 UTC | newest] Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2006-01-23 23:31 [Bug libgcj/25934] New: fast instanceof checking tromey at gcc dot gnu dot org 2006-01-24 0:46 ` [Bug libgcj/25934] " pinskia at gcc dot gnu dot org 2006-03-15 20:26 ` tromey at gcc dot gnu dot org 2006-12-07 18:37 ` tromey at gcc dot gnu dot org
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