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[Caml-list] Stopping a value from getting GC'd

Jonathan Roewen
- Bardur Arantsson
  - Nathaniel Gray
    - Alain Frisch
      - Nathaniel Gray
    - Markus Mottl
      - skaller
    - Richard Jones

Date:	-- (:)
From:	skaller <skaller@u...>
Subject:	Re: [Caml-list] Cost of register_global_root (was: Stopping a value from getting GC'd)

On Wed, 2005-08-17 at 23:57 -0400, Markus Mottl wrote:
> On 8/17/05, Nathaniel Gray <n8gray@gmail.com> wrote:
> > One thing that the FM doesn't mention is how expensive it is to
> > register a global root.  Can I register thousands of them or will
> > there be performance problems?
> 
> There is a severe performance penalty for registering many thousands
> of roots as I have seen in one of our applications.  AFAIK, they are
> scanned at each minor collection.  This will drive up CPU-usage even
> if your program doesn't do much otherwise.  Maybe the GC could be
> improved in that area.

Why not just put the pointers into a (reachable) hashtable?

-- 
John Skaller <skaller at users dot sourceforge dot net>