It's about time to update this list...

grant@later:~/linux/linux-2.6.27-rc6a$ cat /proc/cpuinfo |egrep 'name|MHz|cache|bogo'
model name      : Pentium MMX
cpu MHz         : 232.672
cache size      : 0 KB
bogomips        : 466.26
grant@later:~/linux/linux-2.6.27-rc6a$ time make -j2
...
real    94m40.660s
user    87m23.695s
sys     6m11.526s

grant@peetoo:~/linux/linux-2.6.27-rc6a$ cat /proc/cpuinfo |egrep 'name|MHz|cache|bogo'
model name      : Pentium III (Katmai)
cpu MHz         : 448.992
cache size      : 512 KB
bogomips        : 899.08
grant@peetoo:~/linux/linux-2.6.27-rc6a$ time make -j3
...
real    43m58.510s
user    41m2.603s
sys     2m44.976s

grant@toshi:~/linux/linux-2.6.27-rc6a$ cat /proc/cpuinfo |egrep 'name|MHz|cache|bogo'
model name      : Celeron (Coppermine)
cpu MHz         : 497.562
cache size      : 128 KB
bogomips        : 996.30
grant@toshi:~/linux/linux-2.6.27-rc6a$ time make -j3
...
real    40m3.011s
user    37m16.291s
sys     2m30.873s

grant@black:~/linux/linux-2.6.27-rc6a$ cat /proc/cpuinfo |egrep 'name|MHz|cache|bogo'
model name      : Intel(R) Pentium(R) 4 CPU 2.40GHz
cpu MHz         : 2525.712
cache size      : 512 KB
bogomips        : 5053.90
model name      : Intel(R) Pentium(R) 4 CPU 2.40GHz
cpu MHz         : 2525.712
cache size      : 512 KB
bogomips        : 5053.62
grant@black:~/linux/linux-2.6.27-rc6a$ time make -j3
...
real    7m20.730s
user    13m27.744s
sys     1m0.583s

grant@pooh:~/linux/linux-2.6.27-rc6a$ cat /proc/cpuinfo |egrep 'name|MHz|cache size|bogo'
model name      : Intel(R) Core(TM)2 CPU          6400  @ 2.13GHz
cpu MHz         : 2133.000
cache size      : 2048 KB
bogomips        : 4273.99
model name      : Intel(R) Core(TM)2 CPU          6400  @ 2.13GHz
cpu MHz         : 2133.000
cache size      : 2048 KB
bogomips        : 4273.99
grant@pooh:~/linux/linux-2.6.27-rc6a$ time make -j4
...
real    3m14.277s
user    5m53.770s
sys     0m27.665s

grant@pooh64:~/linux/linux-2.6.27-rc6a$ cat /proc/cpuinfo |egrep 'name|MHz|cache size|bogo'
model name      : Intel(R) Core(TM)2 CPU          6400  @ 2.13GHz
cpu MHz         : 1600.000
cache size      : 2048 KB
bogomips        : 4276.63
model name      : Intel(R) Core(TM)2 CPU          6400  @ 2.13GHz
cpu MHz         : 1600.000
cache size      : 2048 KB
bogomips        : 4273.98
grant@pooh64:~/linux/linux-2.6.27-rc6a$ time make -j4
...
real    3m19.460s
user    5m54.577s
sys     0m35.931s

grant@silly:~$ cat /proc/cpuinfo |egrep 'name|MHz|cache size|bogo'
model name      : Intel(R) Core(TM)2 Quad CPU    Q6600  @ 2.40GHz
cpu MHz         : 2397.656
cache size      : 4096 KB
bogomips        : 4799.84
model name      : Intel(R) Core(TM)2 Quad CPU    Q6600  @ 2.40GHz
cpu MHz         : 2397.656
cache size      : 4096 KB
bogomips        : 4797.99
model name      : Intel(R) Core(TM)2 Quad CPU    Q6600  @ 2.40GHz
cpu MHz         : 2397.656
cache size      : 4096 KB
bogomips        : 4797.97
model name      : Intel(R) Core(TM)2 Quad CPU    Q6600  @ 2.40GHz
cpu MHz         : 2397.656
cache size      : 4096 KB
bogomips        : 4797.98

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$ uname -r
2.6.14.4a

grant@silly:~$ cat /proc/cpuinfo |grep name
model name      : Celeron (Mendocino)

grant@silly:~/linux/linux-2.6.15-rc5$ make oldconfig; time make
real    43m39.999s
user    37m28.870s
sys     2m39.230s

swap CPU...

grant@silly:~$ cat /proc/cpuinfo |grep name
model name      : Pentium II (Deschutes)

grant@silly:~/linux/linux-2.6.15-rc5$ make clean; time make
real    42m52.118s
user    36m55.360s
sys     2m38.360s

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grant@niner:~/linux/linux-2.4.32-final$ make oldconfig; make dep; time make bzImage modules
real    17m17.793s
user    14m33.570s
sys     1m3.720s

grant@niner:~/linux/linux-2.6.14.4a$ make clean; time make
real    32m24.656s
user    27m4.170s
sys     2m17.530s
- - - - - - -
grant@deltree:~/linux-2.4.32-final$ make clean; time make bzImage modules
real    60m19.396s
user    55m12.730s
sys     3m18.060s
- - - - - - -
grant@black:~/linux/linux-2.4.32-final$ make oldconfig; make dep; time make -j3 bzImage modules
real    3m48.588s
user    7m5.330s
sys     0m29.150s

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Note: each box uses own config, thus not a fair comparision.

black:
real    6m37.562s
user    11m48.330s
sys     1m1.590s

sempro:
real    7m29.853s
user    6m46.570s
sys     0m35.700s

tosh:
real    32m41.948s
user    29m45.960s
sys     2m8.500s

pooh:
real    33m21.289s
user    28m14.410s
sys     3m18.920s

peetoo:
real    38m43.846s
user    35m16.290s
sys     2m41.660s

niner:
real    40m18.430s
user    32m27.190s
sys     2m46.350s

silly:
real    43m8.005s
user    37m0.290s
sys     2m38.980s

later:
real    44m9.946s
user    36m14.890s
sys     3m45.370s

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- linux-2.6.15-rc7                                               2005-12-28 -
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Compare compile times RAID1 vs RAID0 vs non-RAID

non-RAID, kernel source in /dev/sdb5
grant@sempro:~/linux/linux-2.6.15-rc7a$ make clean; make -j2; make clean; time make -j2
real    7m36.598s
user    6m58.820s
sys     0m35.870s

RAID1
grant@sempro:~/kernel/linux-2.6.15-rc7a$ make clean; make -j2; make clean; time make -j2
real    7m42.275s
user    6m57.450s
sys     0m36.880s

RAID0
grant@sempro:~/kernel/linux-2.6.15-rc7a$ make clean; make -j2; make clean; time make -j2
real    7m36.395s
user    6m56.210s
sys     0m38.360s

non-RAID, kernel source in /dev/sda3
grant@sempro:~/src/linux-2.6.15-rc7a$ make clean; make -j2; make clean; time make -j2
real    7m41.888s
user    6m55.710s
sys     0m38.900s

non-RAID, kernel source in /dev/sdb3
grant@sempro:~/kernel/linux-2.6.15-rc7a$ make clean; make -j2; make clean; time make -j2
real    7m38.505s
user    6m57.590s
sys     0m38.890s

non-RAID, kernel source in /dev/sdb5 (check repeatability)
grant@sempro:~/linux/linux-2.6.15-rc7a$ make clean; make -j2; make clean; time make -j2
real    7m40.455s
user    6m59.200s
sys     0m38.860s

Bulk disk access times
```````````````````````
write 1GB to non-RAID:
root@sempro:~# time $(dd if=/dev/zero bs=32k count=32k of=/home/grant/linux/zero; sync)
32768+0 records in
32768+0 records out

real    0m20.483s
user    0m0.010s
sys     0m5.570s

write 1GB to RAID0:
root@sempro:~# time $(dd if=/dev/zero bs=32k count=32k of=/mnt/hd/zero; sync)
32768+0 records in
32768+0 records out

real    0m10.397s
user    0m0.010s
sys     0m5.290s

write 1GB to RAID1:
root@sempro:~# time $(dd if=/dev/zero bs=32k count=32k of=/mnt/hd/zero; sync)
32768+0 records in
32768+0 records out

real    0m19.470s
user    0m0.060s
sys     0m5.420s

read 1GB from non-RAID:
root@sempro:~# time dd of=/dev/null bs=32k if=/home/grant/linux/zero
32768+0 records in
32768+0 records out

real    0m11.758s
user    0m0.010s
sys     0m2.060s

read 1GB from RAID0:
root@sempro:~# time dd of=/dev/null bs=32k if=/mnt/hd/zero
32768+0 records in
32768+0 records out

real    0m9.406s
user    0m0.000s
sys     0m3.050s

read 1GB from RAID1:
root@sempro:~# time dd of=/dev/null bs=32k if=/mnt/hd/zero
32768+0 records in
32768+0 records out

real    0m9.948s
user    0m0.000s
sys     0m2.630s


All times this group are best of two attempts.  Read times are probably 
useless indicators since box has 1GB memory...

Retime RAID1:
root@sempro:~# time $(dd if=/dev/zero bs=32k count=32k of=/mnt/hd/zero; sync)
32768+0 records in
32768+0 records out

real    0m21.725s
user    0m0.040s
sys     0m5.090s
root@sempro:~# umount /mnt/hd/
root@sempro:~# mount /dev/md0 /mnt/
root@sempro:~# time dd of=/dev/null bs=32k if=/mnt/zero
32768+0 records in
32768+0 records out

real    0m19.205s
user    0m0.000s
sys     0m3.530s
root@sempro:~# time dd of=/dev/null bs=32k if=/mnt/zero
32768+0 records in
32768+0 records out

real    0m10.809s
user    0m0.010s
sys     0m2.780s


raw write speed?
`````````````````

root@sempro:~# cat /proc/mdstat
Personalities : [raid0] [raid1]
md0 : active raid0 sdb2[1] sda2[0]
      12337792 blocks 64k chunks

unused devices: <none>
root@sempro:~# time $(dd if=/dev/zero bs=64k of=/dev/md0; sync)
dd: writing `/dev/md0': No space left on device
192779+0 records in
192778+0 records out

real    1m48.577s
user    0m0.180s
sys     0m35.600s

RAID0 raw write speed ~119MB/s

root@sempro:~# cat /proc/mdstat
Personalities : [raid0] [raid1]
md0 : active raid1 sdb2[1] sda2[0]
      6168896 blocks [2/2] [UU]

unused devices: <none>
root@sempro:~# time $(dd if=/dev/zero bs=64k of=/dev/md0; sync)
dd: writing `/dev/md0': No space left on device
96390+0 records in
96389+0 records out

real    1m48.609s
user    0m0.060s
sys     0m23.290s

RAID1 raw write speed ~59MB/s

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