Re: Why is Elisp slow?

[Ergus]

On May 6, 2019 8:47:12 PM GMT+02:00, Stefan Monnier <monnier@iro.umontreal.ca> 
wrote:
>>> [ IIUC of the 4 cases above, at most 2 run the same version, so we'd
>>>  need to make sure the same Emacs version can be compiled against
>all
>>>  of those versions.  No idea if it would impose a significant extra
>>>  burden or not, but it's something to be considered.  Also the fact
>>>  that the latest release doesn't work on all those platforms is
>rather
>>>  worrying.  ]
>>
>> Hmm…? I can’t understand :-(
>> Why can’t Emacs can include a specific version of SBCL’s source (e.g.
>as
>> a git module) and compile them all together?̊̈
>
>Exactly because the version that can run on ARM is not the same as the
>one that can run under Windows, which is not the same as the one that
>runs under AMD64.
>
>Of course, maybe I'm confused by the table of available binaries (at
>http://sbcl.org/platform-table.html), and in reality the latest version
>works fine on all supported platforms.
>
>
>        Stefan

What about just ask to sbcl maintainers about portability? On the other hand, 
if Emacs doesn't use extremely fancy stuff in the language we could just rely 
on the system's sbcl version (available in the distro), for gnu/linux systems 
that will be pretty fine and of course that's something that needs specific 
tests. But nothing compared to maintain a compiler. 

Stefan if you need to test sbcl in some specific (weird) architecture just 
send/tell me the tests and the architectured you need to test. (Except windows) 
 and I can do that.

Btw. Should we move this thread to the developers list? (and start the usual 
war)

Please don't go for JS stuff... Please... performance is terrible even with jit.