Re: 64 bit official Windows builds

[Stefan Monnier]

>> Could I ask, what is the benefit of 64 bits compared to 32 bits for windows ?
> It will run roughly twice faster.
[...]
> slower, because running a 32-bit executable on a 64-bit Windows
> requires expensive thunking for every call to any Windows API,

Holy crap?  Really?  It's hard to believe that 64-bit Windows's
emulation of the 32-bit API is so inefficient that it causes a "rough
slowdown" by a factor 2 in an application like Emacs.

Do you see such a factor-of-2 difference when doing "rm lisp/**/*.elc;
make"?  Or in which kind of circumstance have you seen such a slowdown?


        Stefan