On 12.08.2015, at 20:55, Eliot Miranda <eliot.miranda at gmail.com> wrote:

> Hi All,
> 
> 
>     Fabio's kindly done most of the changes.  But some questions remain for more general discussion.  See below.
> 
> Fabio,  thanks so much for doing this, and so quickly!
> 
> On Tue, Aug 11, 2015 at 8:51 PM, Eliot Miranda <eliot.miranda at gmail.com> wrote:
> Hi All,
> 
>     who will update http://squeak.org/downloads/ to include the 5.0 release?
> 
> a) I suggest that the 5.0 all-in-one have a line in the left-hand table that includes the 4.6 release and that it precede the 4.6 release in the list.  
> 
> Done.
>  
> 
> b) the Trunk link points to TrunkImage.zip which contains a non-Spur image.
> 
> So this is the biggie.  What should we do?
> 
> - add a Trunk 5.0 build with a different link?  (Noooooo)
> 
> - change  http://build.squeak.org/job/SqueakTrunk to build what it says (Yessss please, who can do this?)

Done: build.squeak.org/job/Trunk/
But as I said several times, Spur/trunk test just crash for month…


> 
> - add a Squeak 4.6 build job?  Is that even worth it any more considering 4.6 is released and stable?  If it is then what should it build?  David?
> 
> 
> c) Spur VMs need to be linked to by an added line in the Virtual Machines list.
> 
> Not applicable.  the VM links point to the root of my site so they effectively point to both old and Spur VMs.
>  
> 
> d) Spur imagers need to be included in the Image and Changes list under Custom Installation
> 
> Done.
> 
>  
> 
> e) The SqueakV50.sources file also needs to be included in the Current Sources list.
> 
> Done.
> 
>  
> f) we could start a History list for the 5.0 line
> 
> This is probably quite a big reorg on the page and not urgent.
>  
> 
> So there are a few things to fix before 5.0 is freely downloadable.
> 
> On Tue, Aug 11, 2015 at 8:23 PM, Chris Muller <ma.chris.m at gmail.com> wrote:
> In the 17 months since Squeak 4.5 was released, a huge development
> effort took place to create the next generation virtual-machine for
> the Squeak / Pharo / Newspeak family of programming systems.  Squeak
> is the modern incarnation of the Smalltalk-80 programming environment
> originally developed at the Xerox PARC.
> 
> "Squeak 5" introduces this new VM and associated new memory model,
> collectively referred to as "Spur".  Presented [1] by Eliot Miranda
> and Clément Béra at the 2015 International Symposium on Memory
> Management, this new VM affords Squeak applications a significant
> boost in performance and memory management.  Among other
> optimizations, the #become operation no longer requires a memory scan.
> Object pinning and ephemerons are also now supported.  The release
> notes [2] provide more details.
> 
> The new memory model requires a new image file format.  Although this
> new format results in about a 15% increased memory requirement for the
> same number of 4.x objects, a new segmented heap allows memory to be
> given back to the OS when its no longer needed, a great benefit for
> application servers.
> 
> As forward compatibility is as important to the Squeak community as
> backward compatibility, Squeak 5 is delivers an image with identical
> content as the recent 4.6 release.  Although this new Squeak 5 VM
> cannot open images saved under the prior 4.x Cog format, objects and
> code can be easily exported from the 4.x image and then imported into
> Squeak 5.  Applications whose code runs strictly above the Smalltalk
> meta layer will prove remarkably compatible with the new format, most
> applications will require no changes whatsotever.
> 
> Squeak 5 is the result of monumental effort by a tiny group of very
> talented people, but its also just the beginning of yet a new effort;
> Spur is just a stepping stone to a more ambitious goals planned over
> the next five years.
> 
> [1] -- A Partial Read Barrier for Efficient Support of Live
> Object-oriented Programming
> http://conf.researchr.org/event/ismm-2015/ismm-2015-papers-a-partial-read-barrier-for-efficient-support-of-live-object-oriented-programming
> 
> [2] -- Squeak 5 Release Notes
> http://wiki.squeak.org/squeak/6207