I know there are many of you that are just waiting with bated breath for a faster RISC OS Squeak; well now you can stop turning that unattractive shade of blue. I found a spot where a stupid amount of time was being wasted in the UI, fixed it and hey presto! A dramatic improvement in Morphic UI performance. No longer does typing drag horribly. No more do menus take a coffee break to appear. 
http://www.rowledge.org/tim/squeak/Squeak3-9d-RISCOS.zip

As an aside - and talking of stupidly wasted time in the VM- it turns out that around 20% of the entire time is spent handling the insane nonsense of converting old-style Mac OS pixels into proper RISC OS pixels. Are x86 machines afflicted the same way? Maybe the fast graphics cards are able to mask the time taken, but I'm pretty sure they're spending some time on the job. 

tim
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tim Rowledge; tim at rowledge.org; http://www.rowledge.org/tim
Strange OpCodes: HEM: Hide Evidence of Malfunction