# Ruby for MMORPG Scripting **URL:** \ **Category:** Ruby\ **Created:** [July 8, 2007, 2:16am UTC](https://www.ruby-forum.com/t/ruby-for-mmorpg-scripting/108845 "2007-07-08T02:16:45Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![TongKe\_Xue](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/t/8dc957/32.png) [@TongKe\_Xue](https://www.ruby-forum.com/u/TongKe_Xue)\ **Post date:** [July 8, 2007, 2:16am UTC](https://www.ruby-forum.com/t/ruby-for-mmorpg-scripting/108845/1 "2007-07-08T02:16:45Z")
Hey Everyone, I’m working on a massive simulation project (like worldforge). I need to be able to allow users to script objects in the world. I am thinking of ussing Ruby as my scripting language of choice. However: (1) I need to be able to limit the memory usage of the object. (2) I need to be able to limit the CPU cycle usage of the object. I.e. I don’t want users to use my game to calculate digits of PI. Is there a way (or an existing implemntation of Ruby) to let me create these light-weight tasklets/threadlets/processlets (there’s too many objects to have a UNIX process for each object) such that I can limit the memory/cpu usage on each? Thanks, –TongKe (When replying, please do reply all as I might unsubscribe due to the traffic.) ---
**Author:** ![TongKe\_Xue](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/t/8dc957/32.png) [@TongKe\_Xue](https://www.ruby-forum.com/u/TongKe_Xue)\ **Post date:** [July 8, 2007, 2:25am UTC](https://www.ruby-forum.com/t/ruby-for-mmorpg-scripting/108845/2 "2007-07-08T02:25:46Z")
On 7/7/07, TongKe Xue [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > I.e. I don’t want users to use my game to calculate digits of PI. > > Is there a way (or an existing implemntation of Ruby) to let me create > these light-weight tasklets/threadlets/processlets (there’s too many > objects to have a UNIX process for each object) such that I can limit the > memory/cpu usage on each? Not really as far as I know. You can try using Timeout to limit the amount of time a given task runs, but that is certainly not infalliable. Short of creating your own ruby impl. / heavily modifying another ruby impl. the only way I could think to do this would be to make each a process and use the OS facilities (which you said you didn’t want to use). Unless maybe java has per thread cpu / memory limits, in which case you might get jruby to do what you want. Thanks, ---
**Author:** ![TongKe\_Xue](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/t/8dc957/32.png) [@TongKe\_Xue](https://www.ruby-forum.com/u/TongKe_Xue)\ **Post date:** [July 8, 2007, 11:49am UTC](https://www.ruby-forum.com/t/ruby-for-mmorpg-scripting/108845/3 "2007-07-08T11:49:14Z")
I don’t think you’d want to use Ruby for MMORPG scripting. Current implementations are too resource heavy for that. Try a Scheme, a Forth, a Smalltalk or Lua. This comes from a huge Ruby fan. This is one of the ONLY things I wouldn’t use Ruby for. On second thought, there’s a project to compile Ruby to Smalltalk. Maybe a mod of that would give you what you want. Aur ---
**Author:** ![TongKe\_Xue](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/t/8dc957/32.png) [@TongKe\_Xue](https://www.ruby-forum.com/u/TongKe_Xue)\ **Post date:** [July 8, 2007, 9:31pm UTC](https://www.ruby-forum.com/t/ruby-for-mmorpg-scripting/108845/4 "2007-07-08T21:31:49Z")
You’d have to do the same thing that users of the other script languages do, they only perform limited computation and if their computation is incomplete, they yield and pick up later. The real issue becomes a matter of how light weight are ruby threads/objects and exactly how many do you expect to be running at once. Also, the JRuby and IronRuby stuff looks promising at increasing the speed of ruby drastically. TongKe Xue wrote: > Hey Everyone, > > I’m working on a massive simulation project (like worldforge). I need > to > be able to allow users to script objects in the world. I am thinking of > ussing Ruby as my scripting language of choice. However: > > (1) I need to be able to limit the memory usage of the object. > (2) I need to be able to limit the CPU cycle usage of the object. > > I.e. I don’t want users to use my game to calculate digits of PI. > > Is there a way (or an existing implemntation of Ruby) to let me > create > these light-weight tasklets/threadlets/processlets (there’s too many > objects to have a UNIX process for each object) such that I can limit > the > memory/cpu usage on each? > > Thanks, > –TongKe > (When replying, please do reply all as I might unsubscribe due to the > traffic.) ---
**Author:** ![TongKe\_Xue](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/t/8dc957/32.png) [@TongKe\_Xue](https://www.ruby-forum.com/u/TongKe_Xue)\ **Post date:** [July 8, 2007, 7:50pm UTC](https://www.ruby-forum.com/t/ruby-for-mmorpg-scripting/108845/5 "2007-07-08T19:50:44Z")
SonOfLilit wrote: > Maybe a mod of that would give you what you want. > Actually, given that C, Scheme and Forth are good candidates, this might > also be a good Erlang application. I don’t know enough about Lua to > comment about it, but it’s _very_ popular in game circles, and it’s > quite “C-friendly”. Yeah. Smalltalk would probably work. So would Java, for that matter. I personally wouldn’t learn another language if I wanted to build an MMORPG, though, since I’m a better Forth programmer than I am a C programmer anyhow. 😉 I still wonder why the OP wants to build an MMORPG from scratch, though, given the number of existing open source projects that could be hacked/forked/whatever. “worldforge” is itself open source, IIRC. 🙂