From: Jacques Garrigue <garrigue@math.nagoya-u.ac.jp>
To: Tom Ridge <tom.j.ridge+list@googlemail.com>
Cc: OCaml Mailing List <caml-list@inria.fr>
Subject: Re: [Caml-list] Question about garbage collection and impact on performance
Date: Thu, 5 Dec 2013 10:09:00 +0900 [thread overview]
Message-ID: <1711883A-1A24-45E1-A105-453BAAEEE119@math.nagoya-u.ac.jp> (raw)
In-Reply-To: <CABooLwP7eSJ5Zc=3uSwCqU4a8Yy6a8bSm_74fQEhN=ceEzpdVw@mail.gmail.com>
2013/12/04 21:20, Tom Ridge <tom.j.ridge+list@googlemail.com>:
> Dear caml-list,
>
> I have an OCaml program which I expect to run in time O((n^3) *
> (ln(n))) say. My expectations are based (unrealistically) on ignoring
> garbage collection completely. As inputs get large, the program
> performs worse than I expect.
>
> My question is: is it possible for OCaml's garbage collection to alter
> the time complexity of my program?
I would say that, on a program that is already O(n^3), that would be very surprising.
What kind of measure did you do?
If your program uses lots of memory, swapping may be a major slowdown,
using a GC or not (but a badly tuned GC may cause more swapping).
Jacques Garrigue
next prev parent reply other threads:[~2013-12-05 1:09 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-12-04 12:20 Tom Ridge
2013-12-04 12:43 ` Malcolm Matalka
2013-12-04 13:48 ` Gabriel Scherer
2013-12-19 22:47 ` Richard W.M. Jones
2013-12-22 2:25 ` Jon Harrop
2013-12-22 3:04 ` David Sheets
2013-12-22 12:43 ` Jeff Schultz
2013-12-22 10:41 ` Richard W.M. Jones
2013-12-04 18:09 ` Jon Harrop
2013-12-05 1:09 ` Jacques Garrigue [this message]
2013-12-05 10:08 ` Tom Ridge
2013-12-05 10:37 ` Malcolm Matalka
2013-12-05 10:48 ` Michael Hicks
2013-12-05 11:21 ` Tom Ridge
2013-12-05 21:09 ` Jon Harrop
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