From: Shawn O. Pearce Date: Sat, 07 Aug 2010 00:18:29 GMT Subject: Re: [PATCH] pack-object: trim memory usage a tiny bit Message-ID: <20100807001829.GQ25268@spearce.org> In-Reply-To: Nguyen Thai Ngoc Duy wrote: > > Ah, by packing it tighter using bitfields. There are two fields that > act as boolean, but they use at least one byte each. And enum > object_type, I recall, uses 4 bytes (int), while it only needs 5 bits > (4 bits is enough if OBJ_BAD is not counted). No downsides I know of. Actually, object type is 3 bits in the pack file. So unless its using some additional magical values, 4 bits is sufficient to get you 3 bits and the -1 bad value. -- Shawn.