profile-driven optimization?

[Dan Kegel]

Has anybody looked at doing profile-driven optimization (or as the
Intel crowd calls it, profile-guided optimization)
when compiling glibc, or profile-driven reordering of glibc's
functions when linking libc.so.6?
I can imagine gathering profile information from, say,
a suite of typical workstation applications, and
optimizing glibc to fit them, in hopes of producing
a measurably better user experience for that workload.
- Dan

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