[Bug bootstrap/20783] New: [4.1 Regression] Bootstrapping 4.1 takes 50% longer than 4.0

["Thomas dot Koenig at online dot de" <gcc-bugzilla at gcc dot gnu dot org>]

I just ran two parallel bootstraps of mainline and 4.0,
on a single-processor Athlon XP 2600+.

Configuration was with --prefix=$HOME --enable-languages=c,f95
in both cases.

The 4.0 build, which finished earlier, used

real    58m0.437s
user    25m1.021s
sys     1m36.735s

The 4.1 build used

real    67m24.663s
user    38m19.830s
sys     1m41.125s

The compiler used for boostrapping was

$ gcc -v
Using built-in specs.
Target: i686-pc-linux-gnu
Configured with: ../gcc-4.1/configure --prefix=/home/ig25 --enable-languages=c,f95
Thread model: posix
gcc version 4.1.0 20050402 (experimental)

$ cat /proc/cpuinfo
processor       : 0
vendor_id       : AuthenticAMD
cpu family      : 6
model           : 8
model name      : AMD Athlon(TM) XP 2600+
stepping        : 1
cpu MHz         : 2083.203
cache size      : 256 KB
fdiv_bug        : no
hlt_bug         : no
f00f_bug        : no
coma_bug        : no
fpu             : yes
fpu_exception   : yes
cpuid level     : 1
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca
cmovpat pse36 mmx fxsr sse syscall mmxext 3dnowext 3dnow
bogomips        : 4128.76

-- 
           Summary: [4.1 Regression] Bootstrapping 4.1 takes 50% longer than
                    4.0
           Product: gcc
           Version: 4.1.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: bootstrap
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: Thomas dot Koenig at online dot de
                CC: gcc-bugs at gcc dot gnu dot org
  GCC host triplet: i686-pc-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20783