Re: [Haskell-cafe] Compilation time

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 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@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 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@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 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@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

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-- Chris Allen Currently working on http://haskellbook.com

-- Chris Allen Currently working on http://haskellbook.com

-- Chris Allen Currently working on http://haskellbook.com

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