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Bytemark NEURAL NET 36% slower than gcc #13627

Open Quuxplusone opened 12 years ago

Quuxplusone commented 12 years ago
Bugzilla Link PR13587
Status NEW
Importance P normal
Reported by wbrana@gmail.com
Reported on 2012-08-12 05:10:36 -0700
Last modified on 2013-02-10 09:42:08 -0800
Version trunk
Hardware PC Linux
CC geek4civic@gmail.com, llvm-bugs@lists.llvm.org, rafael@espindo.la
Fixed by commit(s)
Attachments
Blocks
Blocked by
See also 
http://www.tux.org/~mayer/linux/nbench-byte-2.2.3.tar.gz

clang trunk
NEURAL NET          :          72.142  :     115.89  :      48.75
gcc 4.7.2 pre
NEURAL NET          :          79.736  :     128.09  :      53.88

CFLAGS = -ggdb -Wall -O3 -funroll-loops -g0 -march=core2 -fomit-frame-pointer -
ffast-math -mssse3 -fno-PIE -fno-exceptions -fno-stack-protector -static
Quuxplusone commented 11 years ago 
clang 3.2
NEURAL NET          :          77.835  :     125.04  :      52.60
gcc 4.8 branch
NEURAL NET          :           121.6  :     195.34  :      82.17

-O3  -g0  -march=corei7 -fomit-frame-pointer -funroll-loops -ffast-math -fno-
PIE -fno-exceptions -fno-stack-protector -static
CPU Sandy Bridge