From: Ryan Anderson <ryan@michonline.com>
Date: Mon, 07 Aug 2006 07:57:45 GMT
Subject: Re: fast-import and unique objects.
Message-ID: <20060807075744.GB15477@h4x0r5.com>
In-Reply-To: <20060806180323.GA19120@spearce.org>

On Sun, Aug 06, 2006 at 02:03:24PM -0400, Shawn Pearce wrote:
> 
>   - It expects an estimated object count as its second parameter.
>     In your case this would be something around 760000.  This tells
>     it how large of an object table to allocate, with each entry
>     being 24 bytes + 1 pointer (28 or 32 bytes).  Overshooting
> 	this number will cause it to degrade by allocating one
> 	overflow entry at a time from malloc.

Hrm, you're allocating a big table and then assigning consecutive
entries out of it, as pointers.

Why not just malloc a big block, and assign offsets into it, as if it
were a really big array.  Every time it runs out, realloc it to double
the current size, and update the base pointer.

-- 

Ryan Anderson
  sometimes Pug Majere