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slow lex????
From: |
Daniel Heiserer |
Subject: |
slow lex???? |
Date: |
Tue, 25 Aug 1998 13:43:24 +0200 |
Hi,
I don't know if this is the right forum for a question about lex/flex,
but I think there are enough experts here to give me a short answer.
I used lex for the first time writing a file-translater for finite
element modells. I scan about 50MB and it was incredible slowly for
reading (20 minutes). Did I make an error? In the O'Reilly book I have
there is mentioned, that lex/flex is probably the fastest lexer one
could write by its own. (Is this true only if i have lots of regexps or
what?)
Currently I am absolutely dissapointed by the speed of lex. I scanned
another file format with 80MB/20s with my own parser.
Can anybody give me a hint. Are there certain things I should know?
Does lex do a lot of caching or does he read the stuff item by item?
Thanks
daniel
--------------------------------------------------------------
Daniel Heiserer, BMW AG, Knorrstrasse 147, 80788 Muenchen
Abteilung EK-20
Tel.: 089-382-21187, Fax.: 089-382-42820
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- slow lex????,
Daniel Heiserer <=