> > --- "Chris \"Winston\" Litchfield" <[EMAIL PROTECTED]> wrote: > > Wow.. a simple thing turns into a boost of information. > > [snip] > > > 3. single points of information (variable istead of multiple function calls) > > This is ok, so long as you properly type them. For example, in your previous > performance tip you said to use an int. A const int, or better still a const > size_t, is actually going to work much better. > > > small or not, its still an improvement..
If you have a compiler that supports it. Afraid that some of the C compilers I compile on dont support const's. > > Yes, but these will only give you a very small performance boost. Almost > negligable. And the time it takes to convert all your code as you suggest is > not really worth the effort IMO. Alas, your debug comment is true but here you say its not worth it.. I contend there is also a debug gain as well :) > > If you need to optimize, you should run the code through a profiler. Then when > you have a report telling you that most of your CPU time is spent in > update_handler or something, you take a look at what the code is doing and try > to make it more efficient. > > I.E. Stop having it loop through every character_data in the game to see who is > fighting, or which mobs need to move this tick, etc. Create lists of these > character_data instances instead, to prevent looping over unimportant data. Or > create an event queue and store the fight and move events in there specifically > when something needs to fight or move. Then only search through those events , > using an optimized search method, to find what you need to do. That sort of > thing will give you HUGE performance gains. > > Most of the ones you speak about are already covered in various snippets out there. I am down to some SMALL changes now for performance gains. My footprint of my mud is base 42 meg of memory. 14 second boot time, etc and all that. When I hit an area of code I am looking at for various reasons I tend to optimize as well. fread_string is something I did not expect to have look at.. but I do :( For those interested there are a couple major snippets for performance been floating around: player_list is one (very very useful) aggro_update() increase in speed by changing order of search I also love the canary style alloc_mem and free_mem.. they really improved some memory issues. Chris "Winston" Litchfield The Mage's Lair (www.mageslair.net)
