[Haskell-cafe] Timing execution of individual functions in ghci?

[John Lato]

While criterion is really great, sometimes you do just want to measure
timings.  For that, you might want to give my package chronograph (
http://hackage.haskell.org/package/chronograph) a try.

On Thu, Oct 23, 2014 at 10:40 PM, Carter Schonwald <
carter.schonwald at gmail.com> wrote:

> indeed. My suggestion is
> 1) use criterion, its awsome
> 2) run the criterion suite with a variety of optimization flag choices so
> you can understand how that changes performance
> 3) use criterion some more !
>
> On Thu, Oct 23, 2014 at 10:35 AM, Daniel Trstenjak <
> daniel.trstenjak at gmail.com> wrote:
>
>>
>> Hi Magnus,
>>
>> > Given that all I'm interested in is relative timings it might even be
>> > enough to do a rough comparison of two implementations too.
>>
>> Optimizations - especially in Haskell - can change the runtime behaviour
>> quite dramatically. So comparing the runtime performance without turned
>> on optimizations is pretty much pointless.
>>
>> Meaningful benchmarking is hard and adding any kind of uncertainty
>> doesn't make it in any way easier.
>>
>>
>> Greetings,
>> Daniel
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>
>
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