[PD] bugs and question
czaja at chopin.edu.pl
Sat Sep 7 14:31:09 CEST 2002
hi Miller, Mathieu, Thomas...
how about explicit rehashing requests, to be issued only in
well-defined circumstances -- say, via a ``rehash if threshold
exceeded'' message to 'pd', and/or, from within
It seems to me, that otherwise (without rehashing) there will
remain a hidden trap, threatening in particular certain types
of applications (e.g. installations), because one cannot avoid
producing new symbols, even if in a very slow pace.
Miller Puckette wrote:
> In general, it's a bad idea in Pd to write externs which create indeter-
> minate numbers of symbols at run time. The original intent was that the
> only time anyone would call gensym was on text typed by the user. In
> this situation the existing realization is quite adequate.
> But even if you've written C code that generates millions of symbols on
> the fly as it runs, the (linear-time-worst-case) existing algo is no worse
> than the (linear-time-worst-case) "smart" algo. In real time it's always the
> worst case that counts, and the less variation in execution time your objects
> can have the less likely someone will get a bad surprise someday. So the
> existing routine, which is _always_ slow, is better than any algorithm that
> is only _occasionally_ slow.
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