From: "Hans Åberg" <haberg-1@telia.com>
To: "Ludovic Courtès" <ludo@gnu.org>
Cc: Andy Wingo <wingo@igalia.com>, Guile Devel <guile-devel@gnu.org>
Subject: Re: CPU and GC cost of bignums
Date: Wed, 5 Feb 2020 22:28:40 +0100 [thread overview]
Message-ID: <C540CAF6-FF5F-4611-A0F8-C0DF5001F340@telia.com> (raw)
In-Reply-To: <87zhdxknf9.fsf@gnu.org>
> On 5 Feb 2020, at 17:29, Ludovic Courtès <ludo@gnu.org> wrote:
>
> Hey ho!
>
> Ludovic Courtès <ludo@gnu.org> skribis:
>
>> … but has the disadvantage that it doesn’t work: ‘numbers.test’ fails
>> badly on bignums.
>
> I think with the excitement I no longer knew what I was saying. So,
> here’s a revised patch that actually preserves memory management (as in:
> ‘mpz_t’ are eventually freed), while getting rid of finalizers.
When I tested the Boehm GC in a C++ program, the finalizers did not seem to make much difference. However, if the program is threaded, it puts locks around all GC allocations, which I think may be time consuming. So maybe you should try letting GMP use ordinary malloc, and GC allocations only for the SCM values creating them, deleting when finalized.
next prev parent reply other threads:[~2020-02-05 21:28 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-04 16:56 CPU and GC cost of bignums Ludovic Courtès
2020-02-05 16:29 ` Ludovic Courtès
2020-02-05 21:28 ` Hans Åberg [this message]
2020-02-06 9:37 ` Andy Wingo
2020-02-06 13:37 ` Ludovic Courtès
2020-02-08 14:05 ` Ludovic Courtès
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