Author: Ross Boyd
Date: 04:44:25 06/20/04
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On June 20, 2004 at 07:20:11, Uri Blass wrote: >On June 20, 2004 at 06:00:58, Ross Boyd wrote: > >>My engine (coded in C) uses longjmp() to terminate a search. >> >>Is there any disadvantage or hidden overhead in this approach? >> >>I notice other engines use a flag which is tested at every node of the search. >>Surely there's an overhead in doing it that way???? >> >>I suppose the main drawback of longjmp() is portability. Most languages other >>than C don't support it. >> >>Am I missing something? >> >>Ross > >Tscp also is using longjmp() >I did not read most of the code of other programs. Yes, and that's where TRACE inherited it. :-) > >I do not know if most languages do not support it. >Basic that was the first language that I wrote small programs with it has the >goto command that is similiar. > >I also do not understand the connection between other languages and portability. > >Do you think to translate trace to program that is not written in C? Yes, by portability I meant cross-language (not cross platform). I have no plans to translate TRACE to another language. :-) Mainly, I was wondering why most don't use longjmp(). It seems to me longjmp() has less overhead than testing everywhere whether to return to root. And it keeps the code simple and efficient. Ross
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