It actually attempts to do that. I spent a fair amount of time this weekend debugging that code since I suspected there was something preventing the mergers from happening. However, it turns out in practice, to be a fairly rare event where requests end up being adjacent to each other. On Windows, I suspect there's a minimum granular size to the request needed to make that happen. On Linux, I think malloc has a header on each allocated block, so it never seems to occur. One thought would be to try to release all segments that might be empty in the hopes that the OS might be able to merge them into a larger block. This, however, will require significantly more rework to the garbage collector than I'm willing to do right before a release.
Rick On Mon, Mar 30, 2009 at 8:04 AM, Mike Cowlishaw <m...@uk.ibm.com> wrote: >> The results were somewhat surprising. First of all, the performance >> was noticeably worse. The interpreter was essentially in a continuous >> state of garbage collection. AND, on top of that, it ran out of >> memory at 4.75Mb rather than 7.5Mb. I tried this using multipliers of >> 2x, 3x, 4x. The bigger the multiplier, the worse the performance when >> things crossed the tipping point. All of these end of giving out of >> memory in the same area. > > Well, thanks for trying! > > Wonders .. could the heap conglomerate adjacent pieces of storage as > they're released (I have no idea of the internals of ooRexx)? > > Mike > > > > > > Unless stated otherwise above: > IBM United Kingdom Limited - Registered in England and Wales with number > 741598. > Registered office: PO Box 41, North Harbour, Portsmouth, Hampshire PO6 3AU > > > > > > > > ------------------------------------------------------------------------------ > _______________________________________________ > Oorexx-devel mailing list > Oorexx-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/oorexx-devel > ------------------------------------------------------------------------------ _______________________________________________ Oorexx-devel mailing list Oorexx-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/oorexx-devel
