[Haskell-cafe] Very _very_ slow compiles on Windows 10

Nicu Ionita nicu.ionita at acons.at
Sat Sep 17 06:04:59 UTC 2016

No virtualisation, it is a dual boot maschine.
1 CPU would be good :-) In my case it is a very small fraction of it.

------ Originalnachricht ------
Von: "A.M." <agentm at themactionfaction.com>
An: haskell-cafe at haskell.org
Gesendet: 17.09.2016 03:20:38
Betreff: Re: [Haskell-cafe] Very _very_ slow compiles on Windows 10

>On 09/16/2016 06:10 PM, Nicu Ionita wrote:
>>  Is anybody else experiencing really slow compilations with GHC 7.10.2 
>>  Windows 10?
>>  I use stack to compile the project and run it under a mingw64
>>  environment provided by Github bash. The CPU usage is very low all 
>>  time (meaning: GHC does barely use the CPU). On same computer with
>>  Ubuntu 16.04 it just compiles normally, but under Windows it is for 
>>  10x slower, maybe even more.
>Are you using virtualization? I see the same thing under virtualbox on
>Ubuntu. Specifically, even after allocating 12 real CPUs to the VM, I
>never see stack-invoked ghc use more than one CPU. On rare occasions,
>the linker phase hangs. I have confirmed that ghc reports 12 
>I'm just glad that Windows is not my primary development platform; it's
>entirely possible that virtualization is the cause. VirtualBox is not
>known for being a speed demon, but the compilation speed is indeed
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