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Re: query reg. gcc
It is worth pointing out that every operating system in wide use will
cache the text of the headers in memory; they will not be reread from
disk for every compilation, only when other memory users force the OS
to throw away the cached copy.
This happens completely transparently to GCC, and isn't going to make
your build any faster than it already is; I just point it out because
your phrasing implies that you think it's being reread from disk each
time.
zw