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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug gcov-profile/95348] GCC records zero functions and modules in
 the profiling data file, ICC does NOT
Date: Wed, 24 Jun 2020 09:06:59 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D95348

--- Comment #41 from Martin Li=C5=A1ka <marxin at gcc dot gnu.org> ---
The patch survives PGO bootstrap of GCC and it shrinks size of gcda
file from 17MB to 12MB.

And compression can achieve the following:

zstd: 3.3 MB

$ time zstd *
real    0m0.082s
user    0m0.068s
sys    0m0.013s

gzip: 3.3 MB

$ time gzip *
real    0m0.357s
user    0m0.328s
sys    0m0.029s

So using compression is a very promising approach.=