http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54135
Bug #: 54135
Summary: Dhrystone 2 test performance has seriously decreased
in recent GCC releases
Classification: Unclassified
Product: gcc
Version: 4.7.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
AssignedTo: [email protected]
ReportedBy: [email protected]
According to Phoronix Test Suite 4, Dhrystone 2 test from BYTE Unix Benchmark
has become significantly slower in recent GCC releases.
GCC 4.4.6 ~ 28 000 000 marks
GCC 4.7.1 ~ 23 000 000 marks
I.e. ~ 22% slower.
Presumably the following GCC flags were used: -O2 -march=native
Hardware platform: x86-64, Intel Core i7 3960X
Benchmark sources: http://www.tux.org/~mayer/linux/bmark.html
Test results:
http://openbenchmarking.org/prospect/1207296-SU-ARCHLINUX98/eeca68961a90e60898a774766ed28402c20eea75
