Initial compile time benchmarks

[Ömer Sinan Ağacan]

Forgot to mention that I use `cabal install <package name>
--ghc-options="-v3" -v3` to install the packages.

2016-03-31 12:00 GMT-04:00 Ömer Sinan Ağacan <omeragacan at gmail.com>:
> Hi Joachim,
>
> That's GHC HEAD at the time with -O1 for stage 2 + libs.
>
> The way I generate the logs is:
>
> - I create a cabal sandbox and run `cabal exec zsh` to set up the env
>   variables.
>
> - I install packages in that shell.
>
> - $ (cat  .cabal-sandbox/logs/*.log | analyze-ghc-timings) > output
>
> I don't know why there would be that much difference. Note that my setup was
> not perfect, I run some other (although lightweight) processes on the side.
>
> 2016-03-31 4:49 GMT-04:00 Joachim Breitner <mail at joachim-breitner.de>:
>> Hi Ömer,
>>
>> thanks for the log. This is roughly GHC HEAD, right?
>>
>> I wanted to check for low-hanging fruit in “my” code, so I compiled
>> Data.Reflection, where your tool reports 12% time spent in Call Arity.
>>
>> But if I run it with profiling, it says 3.5% of time is spent in that
>> pass, and if I run your tool on the timing output produced by a
>> profiled GHC, I get 8.3%, and on the output of a a development build, I
>> get 3.8%.
>>
>>
>> So what is your setup: How did you compile GHC, and with what options
>> are you running it?
>>
>> Greetings,
>> Joachim
>>
>>
>>
>> --
>> Joachim “nomeata” Breitner
>>   mail at joachim-breitner.de • https://www.joachim-breitner.de/
>>   XMPP: nomeata at joachim-breitner.de • OpenPGP-Key: 0xF0FBF51F
>>   Debian Developer: nomeata at debian.org
>>
>>
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