From: Chris Hecker <checker@d6.com>
To: Tom _ <tom7ca@yahoo.com>, caml-list@inria.fr
Subject: Re: [Caml-list] floating point performance
Date: Wed, 30 May 2001 12:06:46 -0700 [thread overview]
Message-ID: <4.3.2.7.2.20010530120230.02804a80@shell16.ba.best.com> (raw)
In-Reply-To: <20010530082931.69180.qmail@web11902.mail.yahoo.com>
A topic that is dear to my heart. I haven't done any nontrivial profiling on my application yet, though, so my advice is currently limited.
>Also, using Bigarray costs a factor of 3 in speed
>compared to otherwise identical code. The profiler
>suggests that subscripting isn't getting inlined.
>Is there some way of getting faster performance out
>of Bigarray?
One thing I noticed is that if the types are at all generalized, the Bigarray.{} accesses aren't inlined. So, my code looks like this:
type ba2d = (float, Bigarray.float64_elt, Bigarray.c_layout) Bigarray.Array2.t
type ba1d = (float, Bigarray.float64_elt, Bigarray.c_layout) Bigarray.Array1.t
let mult (a : ba2d) (x : ba1d) = etc.
If the code's not too big, and you've got the identical C version, I'd like to see it.
Chris
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prev parent reply other threads:[~2001-05-30 19:04 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-05-30 8:29 Tom _
2001-05-30 19:06 ` Chris Hecker [this message]
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