From: Andy Ray <andy.ray@ujamjar.com>
To: Gabriel Scherer <gabriel.scherer@gmail.com>
Cc: Ocaml Mailing List <caml-list@inria.fr>
Subject: Re: [Caml-list] Faster byte code
Date: Sun, 20 Sep 2015 00:24:13 +0100 [thread overview]
Message-ID: <CAHYOizE8G8Kr7vWZfZcn0qJK2X_5X72NR67g3G4kDCjU5pHcMQ@mail.gmail.com> (raw)
In-Reply-To: <CAPFanBEOyNOYOTQnawXTrhsAryCF0cxQGR-gWM-KcOO8T-i6Qg@mail.gmail.com>
Thank you for the explanation. It is interesting that changing
optimisation levels is something that needs to be done so carefully.
Andy
On Sat, Sep 19, 2015 at 11:32 PM, Gabriel Scherer
<gabriel.scherer@gmail.com> wrote:
> I believe the change that was described is the now-merged
>
> GPR#226: Compiling the run-time system at higher levels of C optimization
> https://github.com/ocaml/ocaml/pull/226
>
> From the experiments reported by Xavier, I have the impression that
> most gains are about the way the C compiler optimizes the bytecode
> dispatch loop, so these would be specific to running bytecode-compiled
> programs. Native programs should also benefit by linking to a
> better-optimized runtime system, but no noticeable gains have been
> observed on these so far -- probably because a lot of the runtime code
> is memory-access-bound and harder to optimize.
>
> Note that we don't have much performance numbers for now, so extra
> data points are welcome: if you have a program spending a noticeable
> time in specific parts of the runtime system, you might see a gain.
>
> On Sun, Sep 20, 2015 at 12:06 AM, Andy Ray <andy.ray@ujamjar.com> wrote:
>> Hi,
>>
>> Xavier; you mentioned during the state of ocaml 2015 talk that there
>> was a 30% faster bytecode runtime coming. Is there any more
>> information on this? I found this part of the talk difficult to
>> follow on youtube.
>>
>> I am mainly interested if there will be a change in the bytecode
>> runtime, or if it is related to the compiler.
>>
>> Regards,
>> Andy
>>
>> --
>> Caml-list mailing list. Subscription management and archives:
>> https://sympa.inria.fr/sympa/arc/caml-list
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next prev parent reply other threads:[~2015-09-19 23:24 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-19 22:06 Andy Ray
2015-09-19 22:32 ` Gabriel Scherer
2015-09-19 23:24 ` Andy Ray [this message]
2015-09-20 18:57 ` Adrien Nader
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