[Vm-dev] pluginizing Galois Fields

[Ben Coman]

On Sun, Dec 20, 2015 at 5:55 PM, Robert Withers
<robert.w.withers at gmail.com> wrote:
> On 12/19/2015 04:23 PM, Eliot Miranda wrote:
> On Fri, Dec 18, 2015 at 11:25 PM, Robert Withers <robert.w.withers at gmail.com> wrote:
>> On 12/19/2015 02:09 AM, Eliot Miranda wrote:
>> Hi Robert,
>>
>> On Dec 18, 2015, at 9:51 PM, Robert Withers <robert.w.withers at gmail.com> wrote:
>>
>> Eliot, what does Sista do and how is that accomplished?
>>
>>
>> Run-time adaptive optimisation via an SSA-based image-level bytecode-to-bytecode inlining compiler.  See
>>
>> http://www.mirandabanda.org/cogblog/on-line-papers-and-presentations/
>>
>>
>> It sounds like a next level kind of system. Does it compare to what other JITs are doing in various VMs?
>>
>>
>> Yes it does. Clément recently attended a workshop at Google and found that Sista is very similar in the kinds of optimisations it performs to V8 and Dart.  The key research funding will be how close the performance of targeting stack-oriented bytecode that the Cog JIT converts to register-based code can be made to JITs that directly target register-based machine code.
>>
>>
>> This sounds like you are saying that Sista performs better or more naturally with stack-oriented bytecode. If you wouldn't mind taking the time to explore it with us, what's the difference between stack-oriented and register-based code, such that Sista would be different between them? I'm off to read some.
>
>
> I'd rather not. That's something there's lots of papers on, and I'm not sure it's really important that I explain.  You can inform yourself, and the Sista talks I pointed to at least mention the topic.  I will say that our thesis is that we can generate efficient register-based machine code from stack-oriented bytecode, and that's one of the things we're trying to demonstrate with Sista.
>
>
> Having had a little bit of sleep, upon waking I just have to say I am disappointed in this response. As a seeker of knowledge, I'm certainly willing to research deeply, yet that is a time investment when I also have a full plate. Nonetheless, the negative response to a search of knowledge is indicative of an attitude I often find and it is a real shame, a real shame for everyone. I reread what I wrote and yes, in the scope of an exploration, as I said, denotes a big time investment to dive deep. You could have said so, not a big time investment, but go towards more of a paragraph then a sentence in helping to feed me when I was hungry. A more paranoid personality that lives within me thinks it may have been something I personally did to garnish a more negative response, but I'm convinced it was the way I broached.

You're over thinking it. Please read...
http://www.catb.org/esr/faqs/smart-questions.html
sections...
+ Be explicit about your question
+ How To Interpret Answers

cheers -ben