[Issue 5100] -O Degrades performance of loop statements

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=5100



--- Comment #8 from Iain Buclaw <ibuclaw at ubuntu.com> 2012-01-19 15:39:32 PST ---
And on my netbook:

$ dmd loop2.d
$ time ./loop2
real    0m2.948s
user    0m2.924s
sys    0m0.012s

$ dmd loop2.d -O
$ time ./loop2
real    0m5.725s
user    0m5.688s
sys    0m0.012s


Specs of Netbook:
processor    : 0
vendor_id    : GenuineIntel
cpu family    : 6
model        : 28
model name    : Intel(R) Atom(TM) CPU N270   @ 1.60GHz
stepping    : 2
cpu MHz        : 800.000
cache size    : 512 KB
cpu cores    : 1


Specs of Laptop:
processor    : 0
vendor_id    : AuthenticAMD
cpu family    : 20
model        : 2
model name    : AMD E-450 APU with Radeon(tm) HD Graphics
stepping    : 0
cpu MHz        : 825.000
cache size    : 512 KB
cpu cores    : 2


Regards

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