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<H1>Re: Strings & Memory Usage</H1>
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<LI><em>To</em>: Mud Dev Mailing List <<A HREF="mailto:mud-dev#null,net">mud-dev#null,net</A>></LI>
<LI><em>Subject</em>: Re: Strings & Memory Usage</LI>
<LI><em>From</em>: <A HREF="mailto:clawrenc#cup,hp.com">clawrenc#cup,hp.com</A></LI>
<LI><em>Date</em>: Mon, 14 Apr 97 08:59:57 -0700</LI>
<LI><em>Reply-to</em>: <A HREF="mailto:claw#null,net">claw#null,net</A></LI>
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<PRE>
In <199704150252.CAA220829#out1,ibm.net>, on 04/14/97
at 08:07 PM, Greg Munt <greg#uni-corn,demon.co.uk> said:
>Is there a common way to save the memory used up by storing strings?
Yup, its called reference counting. There are several
implementations, and a vast number of optimisations, but the basic
trick is having a central module control storage of all strings.
Whenever a string is submitted to the module for storage, it compares
it to the other strings it finds, and if it finds a dupe, increments
the reference count on the dupe and returns that, or adds it as a new
string (no other copy found).
Obvious optimisations enclude hashing the string lookups to speed
determining if the string in question already exists in the pool.
Note: OSE has a very slick reference counted string class.
>I'm sure something was said on this subject in the RGMA 'MUD Memory'
>thread (by George Reese, IIRC)
Bugger. Another thread to dig up.
>I will probably be using some sort of bytecode compilation on my mud
>now. Would this method of memory saving simply involve checking a
>list of those strings currently in memory, and either adding a new
>string, or adding a pointer to an old string? (that would probably
>slow down the process unless the storage structure was right, tho)
Bytecoding really has nothing much to do with string compression of
reference counting. If fact, for my implementation bytecoding _costs_
me memory as I keep the flat-ASCII version and the bytecoded version
about (I need easy compile/decompile).
--
J C Lawrence Internet: claw#null,net
(Contractor) Internet: coder#ibm,net
---------------(*) Internet: clawrenc#cup,hp.com
...Honorary Member Clan McFUD -- Teamer's Avenging Monolith...
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<STRONG><A HREF="msg00143.html">Re: Threads and Sockets (Was Ho hum)</A></STRONG>
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<ul><li>Thread context:
<BLOCKQUOTE><UL>
<LI><STRONG>Re: Threads and Sockets (Was Ho hum)</STRONG>, <EM>(continued)</EM>
<ul compact>
<LI><strong><A NAME="00168" HREF="msg00168.html">Re: Threads and Sockets (Was Ho hum)</A></strong>,
Chris Gray <a href="mailto:cg#ami-cg,GraySage.Edmonton.AB.CA">cg#ami-cg,GraySage.Edmonton.AB.CA</a>, Mon 21 Apr 1997, 04:09 GMT
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<LI><strong><A NAME="00135" HREF="msg00135.html">Strings & Memory Usage</A></strong>,
Greg Munt <a href="mailto:greg#uni-corn,demon.co.uk">greg#uni-corn,demon.co.uk</a>, Tue 15 Apr 1997, 03:13 GMT
<UL>
<li><Possible follow-up(s)><br>
<LI><strong><A NAME="00138" HREF="msg00138.html">Re: Strings & Memory Usage</A></strong>,
Jeff Kesselman <a href="mailto:jeffk#tenetwork,com">jeffk#tenetwork,com</a>, Tue 15 Apr 1997, 09:59 GMT
</LI>
<LI><strong><A NAME="00141" HREF="msg00141.html">Re: Strings & Memory Usage</A></strong>,
Shawn Halpenny <a href="mailto:rsh#dos,nortel.com">rsh#dos,nortel.com</a>, Tue 15 Apr 1997, 22:28 GMT
</LI>
<LI><strong><A NAME="00142" HREF="msg00142.html">Re: Strings & Memory Usage</A></strong>,
clawrenc <a href="mailto:clawrenc#cup,hp.com">clawrenc#cup,hp.com</a>, Tue 15 Apr 1997, 22:59 GMT
</LI>
<LI><strong><A NAME="00146" HREF="msg00146.html">Re: Strings & Memory Usage</A></strong>,
ashen <a href="mailto:ashen#pixi,com">ashen#pixi,com</a>, Thu 17 Apr 1997, 00:55 GMT
</LI>
<LI><strong><A NAME="00169" HREF="msg00169.html">Re: Strings & Memory Usage</A></strong>,
Chris Gray <a href="mailto:cg#ami-cg,GraySage.Edmonton.AB.CA">cg#ami-cg,GraySage.Edmonton.AB.CA</a>, Mon 21 Apr 1997, 04:03 GMT
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</UL>
</LI>
<LI><strong><A NAME="00128" HREF="msg00128.html">Re: project management (or coding, kings, and other things)</A></strong>,
Jon A. Lambert <a href="mailto:jlsysinc#ix,netcom.com">jlsysinc#ix,netcom.com</a>, Mon 14 Apr 1997, 11:15 GMT
<LI><strong><A NAME="00127" HREF="msg00127.html">Who is Steward and what can he do for me?</A></strong>,
Jon A. Lambert <a href="mailto:jlsysinc#ix,netcom.com">jlsysinc#ix,netcom.com</a>, Mon 14 Apr 1997, 10:29 GMT
</LI>
</UL></BLOCKQUOTE>
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