Jochen Theodorou wrote: > Charles Oliver Nutter schrieb: >> We largely had the same opinion, that once the inline cache was >> installed the per-class cache was unnecessary. > > well we have no inline cache. We had a per-class > method-call-argument-types-and-name cache. Which maybe can be seen as > inline cache... This kind of cache is troublesome, because you need to > make a key out of the method name and the argument types. Generating > this key and searching with it in a HashMap, even if then done in O(1) > takes almost as long as the method selection itself. When you do call > site caching you bypass the method selection anyway, then there is no > need to pass through a cache that is there to speed up the method > selection. Thereore that cache can vanish. In my ClosureMetaClass for > exmaple I wrote a MetaClass that has a method selection that is special > to the needs of our Groovy Closures. This method selection is faster > than the cache and I plan to migrate the techniques from there to our > normal MetaClasses, to make them faster and to once and for all remove > that per class cache.
Perhaps there's some confusion here. To me, an inline cache is a specific type of call site cache. I considered Groovy's call site cache to be an inline cache. What do you feel is the difference? JRuby has a type, InlineCachingCallSite, instantiated one-per-callsite in the system, which abstracts all logic of calling and caching a method for a given call site. We have also experimented with polymorphic inline caches, but they were rarely useful enough to warrant the extra complexity (and memory use). - Charlie --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "JVM Languages" group. To post to this group, send email to jvm-languages@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/jvm-languages?hl=en -~----------~----~----~----~------~----~------~--~---
