--- Comment #4 from Jan Hubicka <hubicka at gcc dot> ---
We have --param comdat-sharing-probablity which says that average comdat
function has only 20% chance to be shared with another copy of same comdat in
other unit. This was introduced because of Firefox developers complaining that
-Os increases size of C++ and I measured that value somehow in 2010 or so.

It may make sense to re-test if that param works as expected today.

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