Re: Crash in xterm-136 with unicode patch 0.7 (termcap)

[Ulrich Drepper]

Bruno Haible <[EMAIL PROTECTED]> writes:

> Wouldn't it be nice if gcc, by itself, would put initialized variables
> into BSS if the initializer is entirely zero/null/0.0 ?

No, since you have to be able to do just this as well.

> True. But the amount of VM you can save on non-array variables is
> tiny. I did the optimization for libX11. The savings was a few hundred
> bytes at most. Given a page size of 4096, this means that it saved the
> loading of 1 page from disk with a probability of 10%, and no gain
> with a probability of 90%.

I did the optimization for various libraries, espcially glibc.  And
the result was moving about 7kB from .data to .bss.  And these are 1
and 2 pages respectively which don't have to be loaded for every
single application on the system.

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