[Haskell-cafe] Performance counters
dons at galois.com
Mon May 4 16:28:13 EDT 2009
> OK, so I'm pretty sure I'm not the first person to run into this...
> I've got a fairly large, complex program. It seems to work fine. But now
> I want to add some counters to measure various things.
> Trouble is, to do that, I'd have to "infect" the entire program with
> boilerplate code to propogate these counters. At best I could wrap it up
> in a monad, but it's still annoying to have to make 90% of the code in
> the program monadic just to carry these performance counters around.
> Does anybody know of a better solution? I could use the dreaded
> unsafePerformIO to prod some IORefs, but now you have to start
> sprinkling NOINLINE pragmas around and hope you know what you're
> doing... Scary! o_O
What kind of counters? Do you just want to measure how often things are
evaluated? Use -fhpc (which inserts 'ticks' for you).
Otherwise, you'll need some kind of manual tick system.
More information about the Haskell-Cafe