gcc 4.9 Very slow

[Ali Abdul Ghani <blade dot vp2020 at gmail dot com>]

Hi
When I compare gcc 4.8 in gcc 4.9
gcc 4.9 Very slow



cpu:
Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Byte Order: Little Endian CPU(s): 2 On-line CPU(s) list: 0,1 Thread(s)
per core: 1 Core(s) per socket: 2 Socket(s): 1 NUMA node(s): 1 Vendor
ID: GenuineIntel
CPU family: 6
Model: 23
Stepping: 10
CPU MHz: 2403.000
BogoMIPS: 5984.37
Virtualization: VT-x
L1d cache: 32K
L1i cache: 32K
L2 cache: 2048K
NUMA node0 CPU(s): 0,1

gcc -v
Using built-in specs.
COLLECT_GCC=g++-4.9
COLLECT_LTO_WRAPPER=­/usr/lib/gcc/­x86_64-linux-gnu/4.9/­lto-wrapper
Target: x86_64-linux-gnu
Configured with: ../src/­configure -v --with-pkgversion='Ubuntu
4.9.1-1ubuntu2~14.04­.3'
--with-bugurl=file:/­//usr/share/doc/­gcc-4.9/­README.Bugs
--enable-languages=c,c++,jav­a,go,d,fortran,objc,­obj-c++
--prefix=/­usr --program-suffix=-4.9 --enable-shared
--enable-linker-buil­d-id --libexecdir=/usr/­lib
--without-included-g­ettext --enable-threads=pos­ix
--with-gxx-include-d­ir=/usr/include/c++/­4.9 --libdir=/usr/lib
--enable-nls --with-sysroot=/­ --enable-clocale=gnu
--enable-libstdcxx-d­ebug --enable-libstdcxx-t­ime=yes
--enable-gnu-unique-­object --disable-libmudflap­
--disable-vtable-ver­ify --enable-plugin --with-system-zlib
--disable-browser-pl­ugin --enable-java-awt=gt­k
--enable-gtk-cairo
--with-java-home=/­usr/lib/jvm/­java-1.5.0-gcj-4.9-am­d64/­jre
--enable-java-home
--with-jvm-root-dir=/usr/­lib/jvm/­java-1.5.0-gcj-4.9-am­d64
--with-jvm-jar-dir=/­usr/lib/jvm-exports/­java-1.5.0-gcj-4.9-am­d64
--with-arch-director­y=amd64
--with-ecj-jar=/usr/­share/java/­eclipse-ecj.jar --enable-objc-gc
--enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64
--with-multilib-list­=m32,m64,mx32 --enable-multilib
--with-tune=generic --enable-checking=re­lease
--build=x86_64-linux­-gnu --host=x86_64-linux-­gnu --target=x86_64-linu­x-gnu
Thread model: posix
gcc version 4.9.1 (Ubuntu 4.9.1-1ubuntu2~14.04­.3)