http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55309
Bug #: 55309
Summary: gcc's address-sanitizer 66% slower than clang's
Classification: Unclassified
Product: gcc
Version: 4.8.0
Status: UNCONFIRMED
Severity: enhancement
Priority: P3
Component: other
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: mar...@trippelsdorf.de
Comparing gcc build times:
CC="clang -fsanitize=address -w" CXX="clang++ -fsanitize=address -w"
~/gcc/configure --disable-bootstrap --disable-werror --disable-multilib
--enable-languages=c,c++
with
CC="gcc -faddress-sanitizer" CXX="g++ -faddress-sanitizer" ...
and
CC="gcc -fno-var-tracking -faddress-sanitizer" CXX="g++ -fno-var-tracking
-faddress-sanitizer" ...
Clang : nice -n 19 make -j4 1173.74s user 104.73s system 325% cpu 6:32.18
total
gcc : nice -n 19 make -j4 3653.30s user 122.27s system 369% cpu 17:00.77
total
gcc_no: nice -n 19 make -j4 2925.20s user 116.42s system 357% cpu 14:11.52
total
"perf top" shows references_value_p() and value_member() on top.
