skanev d3c6d20d0a Add compression size reporting hooks. ...

Also, force inlining util::compression::Sample().

The inlining change is necessary. Without it even with FDO+LIPO the call
doesn't get inlined and uses 4 registers to construct parameters (which
won't be used in the common case). In some of the more compute-bound
tests that causes extra spills and significant overhead (even if
call is sufficiently long).
For example, with inlining:
BM_UFlat/0         32.7µs ± 1%    33.1µs ± 1%  +1.41%
without:
BM_UFlat/0         32.7µs ± 1%    37.7µs ± 1%  +15.29%

2017-03-08 11:42:21 -08:00

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