[Bug sanitizer/55309] gcc's address-sanitizer 66% slower than clang's

[kcc at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55309

--- Comment #58 from Kostya Serebryany <kcc at gcc dot gnu.org> ---
FTR, here are the new numbers; except for 464.h264ref looks good.
clang r199888, gcc r207025
flags: -O2 -fsanitize=address
machine: Dell 3500 (Intel(R) Xeon(R) CPU W3690  @ 3.47GHz)

                           clang          gcc            diff
       400.perlbench,      1286.00,        -1.00,        -0.00
           401.bzip2,       857.00,       940.00,         1.10
             403.gcc,       621.00,       606.00,         0.98
             429.mcf,       578.00,       574.00,         0.99
           445.gobmk,       860.00,       850.00,         0.99
           456.hmmer,       880.00,      1149.00,         1.31
           458.sjeng,       992.00,       996.00,         1.00
      462.libquantum,       492.00,       483.00,         0.98
         464.h264ref,      1274.00,      3998.00,         3.14
         471.omnetpp,       566.00,       569.00,         1.01
           473.astar,       661.00,       647.00,         0.98
       483.xalancbmk,       478.00,       491.00,         1.03
            433.milc,       620.00,       611.00,         0.99
            444.namd,       601.00,       528.00,         0.88
          447.dealII,       624.00,       670.00,         1.07
          450.soplex,       366.00,       389.00,         1.06
          453.povray,       430.00,       374.00,         0.87
             470.lbm,       355.00,       452.00,         1.27
         482.sphinx3,       926.00,      1108.00,         1.20