[issue25702] Link Time Optimizations support for GCC and CLANG

[INADA Naoki]

INADA Naoki added the comment:

> For sure you are not the only user that has active workloads on the physical machine while you do benchmarks :)

I think largest machine type I chosen (32core) can avoid sharing physical machine with other users.

> On the other hand, the path you are going with just LTO is nice for experiments, but for real-world usages is not feasible. Using it in conjunction with PGO is the way to have the best Python interpreter, and I strongly recommend for you to use the v04 versions of the patches.

I agree PGO+LTE is the best.  But I want "only LTO" because:

1) It is a pitfall that `./configure --with-lto && make` doesn't use LTO.
2) PGO makes build too slow.  For casual usecase, I can wait LTO but not PGO.

----------

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue25702>
_______________________________________