comparison of execution speed of array types
Ketil Z. Malde
20 Jan 2003 15:13:24 +0100
"Zdenek Dvorak" <email@example.com> writes:
>>DiffArray seems to be broken :). Either that or I'm using it
> I've tried to use DiffArray recently and it is terribly slow.
Just another data point. I'm fumbling around with Arrays these days
(see my recent post on haskell-cafe) and thought I'd try DiffArray.
After all, I'm building large lists of index/values, and applying (//)
Now, the docs on how to use DAs aren't all that extensive, but I
replaced the type signatures, and at least the type checker is happy.
However, quickCheck (great tool) just prints a digit and hangs there.
Running the compiled program gave:
nice time ./a.out +RTS -p -h -K16M
Fail: thread blocked indefinitely
Command exited with non-zero status 1
1.08user 0.03system 0:01.13elapsed 97%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (272major+1756minor)pagefaults 0swaps
I'm probably missing something essential, any idea what it might be?
If I haven't seen further, it is by standing in the footprints of giants