method dictionary lookups and walking up the inheritance tree
John M McIntosh
johnmci at smalltalkconsulting.com
Tue May 16 19:37:46 UTC 2006
I recall cross checking the squeak VM at: and methodcache hit ratio's
in 2001? and the numbers I got where still in line with
numbers observed in the "Green book"
On 16-May-06, at 12:31 PM, tim Rowledge wrote:
> On 16-May-06, at 12:05 PM, John M McIntosh wrote:
>> I'll note the cache is very efficient, someone a few years back
>> attempted to make some changes and make the cache much much bigger
>> In testing on various platforms we could not show any improvement
>> in the standard benchmarks to justify the additional memory
> I think it was worse - on several machines of plausible spec it
> actually got slower.
> VisualWorks (and probably other VMs at a guess) got some serious
> benefits out of polymorphic inline caches. I rather doubt inline
> caching is going to work in an interpreter but there might be some
> advantage in making the current global cache polymorphic. It could
> be a decent experiment to try out as a class exercise for example,
> since even if it turns out not to be beneficial it would be
> instructive and require all the usual investigative, analytical and
> explicative skills. I'd even volunteer to help with reviewing and
> grading, subject to time constraints.
> tim Rowledge; tim at rowledge.org; http://www.rowledge.org/tim
> World Ends at Ten! Pictures at 11 on Fox News!
John M. McIntosh <johnmci at smalltalkconsulting.com> 1-800-477-2659
Corporate Smalltalk Consulting Ltd. http://www.smalltalkconsulting.com
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