[antlr-dev] Re: [antlr-interest] generating cyclic state machines
in Java
Terence Parr
parrt at cs.usfca.edu
Fri Feb 10 12:49:45 PST 2006
On Feb 9, 2006, at 3:00 PM, Martin Probst wrote:
>> I hope! I am also going to probably allocate one big 1D array and
>> then simulate the 2D array rather than let it create n arrays for n
>> DFA states. Slows down GC etc...
>
> The two rules of optimisation:
> 1. Don't do it
> 2. (for experts) Don't do it yet
>
> Why not get a working system and benchmark it first?
Exactly what I was doing to do ;) I was going to do the obvious
first with the caveat that I must be able to limit the size of each
state, deferring to a complicated hetergeneous state for unicode and
predicates.
> In my experience
> the JIT & friends always behave different from what you'd expect ...
yup...
Ter
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