From: Gabriel Scherer <gabriel.scherer@gmail.com>
To: Andy Ray <andy.ray@ujamjar.com>
Cc: Ocaml Mailing List <caml-list@inria.fr>
Subject: Re: [Caml-list] Faster byte code
Date: Sun, 20 Sep 2015 00:32:23 +0200 [thread overview]
Message-ID: <CAPFanBEOyNOYOTQnawXTrhsAryCF0cxQGR-gWM-KcOO8T-i6Qg@mail.gmail.com> (raw)
In-Reply-To: <CAHYOizHVkDRjLBXdg6tA_pqfisHStqpfM8PkEShWVrwGwQ+nyw@mail.gmail.com>
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
>
> --
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next prev parent reply other threads:[~2015-09-19 22:33 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 [this message]
2015-09-19 23:24 ` Andy Ray
2015-09-20 18:57 ` Adrien Nader
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