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
