From: Andrew Cagney <ac131313@cygnus.com>
To: Daniel Berlin <dan@cgsoftware.com>
Cc: gdb-patches@sources.redhat.com, Jim Blandy <jimb@cygnus.com>
Subject: Re: PATCH: fail to improve psymtab memory consumption
Date: Tue, 24 Jul 2001 07:49:00 -0000 [thread overview]
Message-ID: <3B5D85C3.1000104@cygnus.com> (raw)
In-Reply-To: <87zo9uaow2.fsf@cgsoftware.com>
>> Does this require serial or random file i/o?
>
> ... you could make fread use mmap
> in special cases, but they don't happen enough in practice to make
> fread fast enough to beat mmap.
It may not happen enough to ``beat mmap'', it certainly happens enough
to justify the implementation of FILE using V/M based schema.
Anyway, that isn't the objective. The objective is to get the dwarf2
reader clean simple and pragmatically fast. Fast, at all cost, is like
micro-optomizing using STREQ() macros. If you think there should be a
mmap implementation then abstract it out so that dwarf2 uses it rather
than contains it.
If you think there should be MMAP, then get it added to BFD where all
readers will benefit, not just DWARF2.
Andrew
next prev parent reply other threads:[~2001-07-24 7:49 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20010720212013.7DA695E9D8@zwingli.cygnus.com>
2001-07-20 15:17 ` Daniel Berlin
2001-07-20 22:22 ` Jim Blandy
2001-07-20 23:17 ` Daniel Berlin
2001-07-21 8:50 ` Jim Blandy
2001-07-23 20:36 ` Andrew Cagney
2001-07-23 22:15 ` Daniel Berlin
2001-07-24 7:49 ` Andrew Cagney [this message]
2001-07-24 9:47 ` Daniel Berlin
2001-07-24 9:16 ` Kevin Buettner
2001-07-24 9:35 ` Christopher Faylor
2001-07-24 10:13 ` Frank Ch. Eigler
2001-07-24 10:57 ` Christopher Faylor
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