Is this a good place to come with code that runs into speed problems?
I am writing a program in perl6 to read the xml file from a Sony book
reader, list the books, and move books into collections (the Sony
software to do this will only work on windoz and not on wine).
I have a grammar that works with abbreviated test versions of the xml
file, but it just hangs with the full version.
Since I have a line
my $parsed= sony_grammar(slurp "media.xml");
and the problem is in the parsing, I dont know how to insert trace
statements to determine at what stage the problem is being generated.
In addition, there is a great deal in the Synopses about code points and
backtracking and the like, which I dont quite understand. However, it
seems to me that an intelligent use of these possibilities could
increase the efficiency of the parsing, if only I knew how. For example,
only three of the tags in the file are of interest, and within them
three of the attributes. So how do I tell the regex engine to skip
processing if the tag is not of interest?