[Vm-dev] [Ann] Cuis is now Spur enabled!

Juan Vuletich JuanVuletich at zoho.com
Fri Aug 19 15:23:51 UTC 2016

Hi Folks,

I've successfully finished the Spur conversion of Cuis. I was able to 
merge all required changes to Cuis compiler and make it work in both 
ObjectMemories. Cuis is now offered in Spur and pre-Spur formats. And 
the best part is that they share 100% of the source code. There is no 

This means that there is no extra work in maintaining both flavors. So, 
we are not leaving anyone behind. It also means that, at deployment, you 
might chose between better performance and larger memory (with Spur) or 
smaller footprint and SqueakJS compatibility (with pre-Spur).

I've just updated our GitHub repo 
https://github.com/Cuis-Smalltalk/Cuis-Smalltalk-Dev . Included are 
Cuis4.2-2906-spur.image and Cuis4.2-2906.image, and, as usual, the whole 
update stream. I wrote a brief description of the Spur conversion at 
Documentation/SpurConversion.md, in case you want to reproduce it, or 
apply it to your own Cuis images.

The images seem very stable. Please test them, load your code, and 
report any issues. This work was enabled by Eliot Miranda and the 
OpenSmalltalk team who develop Spur, VMMaker and the Spur bootstrap. 
Thank you folks! I also used Squeak 5 as a reference implementation of 
Compiler and related stuff. I also want to thank the greater Squeak 
community for it.

Some cleanup is in order. The scaffolding I did for the conversion, 
including dual Compilers is still in the image. I'll be cleaning it 
soon. I'll also be able to pay a bit more attention to unrelated 
suggestions and ongoing discussion at cuis-dev at cuis-smalltalk.org



Juan Vuletich

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