* Richard Stallman <rms@gnu.org> at 2004-05-03 18:20-0400
| the main possible benefit of this change is a speedup.  How much
| speedup do you observe from it?  It would be good to compare various
| GCC optimization levels as well as the two versions of the code.

well, the fact is i don't know how to measure this speedup? Could you suggest
some agreeable method?

| A large part of your change seems to be in the indentation of the
| #define's for bytecode operations.  Please do not combine such a large
| cosmetic change with any substantive change.

yup, sorry for that. I undoed those noisy re-indentation.
here's the patch again.