Hello.
Cog performance is incredible. My application improved 3 times speedup. And I now does not need special caching logic in my program.
But I found very strange behavior in xml dom parsing of big text with many russian text (by XML-Parser XMLDOMParser class).
russionXml := String streamContents: [:s | s nextPutAll: '<root>'.
1000 timesRepeat: [
s nextPutAll: '<item>'.
s nextPutAll: 'ĘŁ×ĮŠŅĻĢÄ'.
s nextPutAll: '</item>'].
s nextPutAll: '</root>'
].
[XMLDOMParser parseDocumentFrom: russionXml] timeToRun .
In pharo 1.1 I have
567 ms with old VM.
6673 ms with Cog VM.
But all other stuff that I tested work faster with Cog (at 3-4 times faster).