[antlr-interest] Lazy load of CommonTokenStream??

[Gavin Lambert]

At 08:14 18/08/2008, Jim Idle wrote:
>Right - so, if size is called a lot then you will add the if to 
>that too. I think that internally size won't be called before 
>something else has already called fillBuffer(). So my point is 
>that we should look at all the paths and cover all the runtime 
>possibilities, then see if it makes sense to have the if in 
>size() - as in, can it be added there without increasing the 
>overall checking done for if (p==0). I found the call to size() 
>to be significant enough that I wanted to optimize it, and while 
>a check for an integer == 0 is quick, it is still overhead.

I suspect that LA() is being called significantly more often than 
size(), so it's probably not a big deal :)