[antlr-interest] wow; talk about premature optimization
scott at javadude.com
Wed Mar 30 20:22:09 PST 2005
> Java VMs probably just
> aren't too good at switches unless they are consecutive values.
Yep - there are two bytecodes for switches -- one is just a simple offset
table for densely populated values, while the other has to do a two-hop
> So, I am tentatively switching back to pure java, no bytecodes.
Good -- glad to hear it...
Next time, remember -- write it for good design, then profile, then tweak...
You'll rarely outguess a compiler & optimizer
> Apparently I did the bytecode stuff for "fun". No biggie as
> I really wanted to learn how to gen .class files and generate
> bytecodes. I'm well prepared for a grad programming class now. :)
Yup -- can be fun... Did you use the jakarta bytecode stuff (BCEL?) or
(I wrote a bytecode assembler for a C++ to PicoJava compiler once... fun
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