[Haskell-cafe] Compile times and separate compilation

[Wojtek Narczyński]

On 28.02.2016 21:25, Benno Fünfstück wrote:
>
> I think there's a problem with the number of cores that they report: 
> the vms/containers report 16 cores, while they only have 2. Perhaps 
> -j2 would work better?
>
>

Yes :-)

cabal build -j1 ....... 7.989s
cabal build -j4 ....... 4.736s (I have 4 cores)
cabal build -j16 ... 40.510s

Today I realized I forgot -O2 yesterday, which cabal uses, I guess. Now 
cabal does not look that bad.

ghc -O2 -j .......... 3.835s
ghc -O2 ............. 6.462s

-- 
Wojtek