One thing you can do to optimize a tokenizing interpreter is to
precalculate and store the goto and gosub destination and return
addresses. This way the interpreter does not have to start at line 0
searching sequentially through the tree for the destination for a gosub
but will just go there directly. Of course calculated destinations (ie:
10 if x then gosub x+x+1) totally ruin this system for that line of code.
Basic XE and Basic XL from OSS used this feature in thier "FAST" command
(a sort of post-tokenized address precompiler) to boost performance. --
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Jeffrey S. Worley
Technical Services
Bits & Bytes Computer Services Inc.
1979B Hendersonville Road
Asheville, NC 28803
828-684-8953 - voice 0900-1700 five days
828-687-9284 - 24hr fax
Who is General Failure and why is he reading my hard disk?
Technoid_at_Cheta.net
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Received on Tue Feb 29 2000 - 18:01:39 GMT
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