[Haskell-cafe] Compilation time

Tue Aug 25 11:42:43 UTC 2015

I think it's working correctly: it doesn't recompile if not necessary.
It's just that the compilation is slow: 1m30 to 4m if the system is a bit
loaded.

On Tue, Aug 25, 2015 at 6:55 AM, Michael Snoyman <michael at snoyman.com>
wrote:

> This sounds like another manifestation of[1]. tl;dr: stack added a feature
> in the 0.1.3.0 release that checks if modules or data files are used by
> your code but not listed in your cabal file. The current implementation
> will then notice on the *second* build that it didn't know about these
> files the first time around, and rebuild. In single-package projects, this
> isn't a big deal, but in multi-package projects, it causes a cascade
> rebuild. Manny and I discussed yesterday, and we have a plan for fixing
> this.
>
> On the other hand, if the rebuild happens every time you run stack build,
> without requiring any changes to files to trigger it, that would be a
> problem. If so, please open a separate Github issue for us to assess and
> discuss.
>
> [1] https://github.com/commercialhaskell/stack/issues/838
>
> On Tue, Aug 25, 2015 at 1:04 AM, Christopher Allen <cma at bitemyapp.com>
> wrote:
>
>> Did you run it multiple times and get that output? Also you usually want
>> stack build.
>>
>> My work projects use Stack and it'll *only* build my current project when
>> I run stack build (and be fairly fast) unless I changed the source, a cabal
>> file, or a stack.yaml.
>>
>> If you did run it multiple times and got that output, is something
>> touching those directories between builds?
>>
>> On Mon, Aug 24, 2015 at 4:38 PM, Corentin Dupont <
>> corentin.dupont at gmail.com> wrote:
>>
>>> i tried, but the time is still around 1m20s.
>>> The syntax is:
>>>
>>> packages:
>>> - '.'
>>> - location: ../Nomyx-Core
>>>   extra-dep: true
>>> - location: ../Nomyx-Language
>>>   extra-dep: true
>>> - location: ../Nomyx-Web
>>>   extra-dep: true
>>>
>>> Right?
>>> It spends a lot of time apparently recompiling dependencies:
>>>
>>> $ stack install
>>> Nomyx-Core-0.7.6-30a37de35e61a9979fabc74d548ee6e6: unregistering
>>> Nomyx-Language-0.7.6-06bfc13bf2ab48163968e23e340be801: unregistering
>>> Nomyx-Web-0.7.6-b75419b3b0faacbe02c94176b84e0564: unregistering
>>> Nomyx-Language-0.7.6: build
>>> Nomyx-Language-0.7.6: install
>>> Nomyx-Core-0.7.6: build
>>> Nomyx-Core-0.7.6: install
>>> Nomyx-Web-0.7.6: build
>>> Nomyx-Web-0.7.6: install
>>> Nomyx-0.7.6: build
>>> Building Nomyx-0.7.6...
>>> Preprocessing executable 'Nomyx' for Nomyx-0.7.6...
>>> Linking .stack-work/dist/x86_64-linux/Cabal-1.18.1.5/build/Nomyx/Nomyx
>>> ...
>>> Nomyx-0.7.6: install
>>> Installing executable(s) in
>>>
>>> /home/cdupont/Dropbox/Nomyx/Nomyx/.stack-work/install/x86_64-linux/lts-2.19/7.8.4/bin
>>> Completed all 4 actions.
>>> Copying from
>>> /home/cdupont/Dropbox/Nomyx/Nomyx/.stack-work/install/x86_64-linux/lts-2.19/7.8.4/bin/Nomyx
>>> to /home/cdupont/.local/bin/Nomyx
>>>
>>> Installed executables to /home/cdupont/.local/bin/:
>>> - Nomyx
>>>
>>>
>>>
>>> On Mon, Aug 24, 2015 at 11:16 PM, Christopher Allen <cma at bitemyapp.com>
>>> wrote:
>>>
>>>> You need to specify extra-deps: true for Nomyx-* if you to cache the
>>>> build results and treat them like dependencies rather than core parts of
>>>> your project.
>>>>
>>>> On Mon, Aug 24, 2015 at 4:15 PM, Corentin Dupont <
>>>> corentin.dupont at gmail.com> wrote:
>>>>
>>>>> My stack.yaml is like that:
>>>>>
>>>>> flags: {}
>>>>> packages:
>>>>> - '.'
>>>>> - ../Nomyx-Core
>>>>> - ../Nomyx-Language
>>>>> - ../Nomyx-Web
>>>>> extra-deps:
>>>>> - Nomyx-Core-0.7.6
>>>>> - Nomyx-Language-0.7.6
>>>>> - Nomyx-Web-0.7.6
>>>>> - hint-server-1.4.2
>>>>> - DebugTraceHelpers-0.12
>>>>> - acid-state-0.12.4
>>>>> - either-unwrap-1.1
>>>>> - eprocess-1.7.2
>>>>> - happstack-authenticate-2.1.4
>>>>> - reform-0.2.7
>>>>> - reform-blaze-0.2.4
>>>>> - reform-happstack-0.2.5
>>>>> - time-recurrence-0.9.2
>>>>> - web-routes-0.27.9
>>>>> - web-routes-happstack-0.23.9
>>>>> - web-routes-regular-0.19.0
>>>>> - web-routes-th-0.22.3
>>>>> - boomerang-1.4.5
>>>>> - data-ordlist-0.4.7.0
>>>>> - happstack-hsp-7.3.5
>>>>> - happstack-jmacro-7.0.10
>>>>> - hsp-0.10.0
>>>>> - hsx-jmacro-7.3.6
>>>>> - hsx2hs-0.13.3.2
>>>>> - ixset-typed-0.3
>>>>> - jwt-0.6.0
>>>>> - pwstore-purehaskell-2.1.4
>>>>> - web-routes-boomerang-0.28.4
>>>>> - web-routes-hsp-0.24.6
>>>>> - harp-0.4.1
>>>>> resolver: lts-2.19
>>>>>
>>>>> Is that correct?
>>>>>
>>>>> On Mon, Aug 24, 2015 at 10:54 PM, Christopher Allen <cma at bitemyapp.com
>>>>> > wrote:
>>>>>
>>>>>> Do you have additional packages other than '.' specified in your
>>>>>> stack.yaml? If so, are they specified with extra-dep: true or extra-dep:
>>>>>> false or not specified at all?
>>>>>>
>>>>>> On Mon, Aug 24, 2015 at 3:44 PM, Corentin Dupont <
>>>>>> corentin.dupont at gmail.com> wrote:
>>>>>>
>>>>>>> Hi guys,
>>>>>>> I have an application with around 7K loc in 4 packages. It takes
>>>>>>> 1min30 to compile with stack.
>>>>>>> Is it a normal compilation time?
>>>>>>> My computer is fairly recent with Intel i7... I run some music in
>>>>>>> background :).
>>>>>>> Is there some statistics about compilation time somewhere?
>>>>>>> Thanks.
>>>>>>> Corentin
>>>>>>>
>>>>>>> _______________________________________________
>>>>>>> Haskell-Cafe mailing list
>>>>>>> Haskell-Cafe at haskell.org
>>>>>>> http://mail.haskell.org/cgi-bin/mailman/listinfo/haskell-cafe
>>>>>>>
>>>>>>>
>>>>>>
>>>>>>
>>>>>> --
>>>>>> Chris Allen
>>>>>> Currently working on http://haskellbook.com
>>>>>>
>>>>>
>>>>>
>>>>
>>>>
>>>> --
>>>> Chris Allen
>>>> Currently working on http://haskellbook.com
>>>>
>>>
>>>
>>
>>
>> --
>> Chris Allen
>> Currently working on http://haskellbook.com
>>
>> _______________________________________________
>> Haskell-Cafe mailing list
>> Haskell-Cafe at haskell.org
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>>
>>
>
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