On 02/13/16 07:57 PM, Karel Gardas wrote:
On 02/12/16 09:02 PM, Reid Barton wrote:
btw, just recent experience on ARM64 (X-gene board):
bootstrapping 7.10.1 with 7.6.x took: ~120 minutes bootstrapping 8.0.1 RC2 with 7.10.1 took: ~446 minutes
both run as: ./configure; time make -j8
It would be interesting to have the time for bootstrapping 7.10.1 with 7.10.1 too, for comparison.
boostrapping 7.10.1 with 7.10.1 took: ~212 minutes -- but this is not comparable directly with numbers above since for whatever reason haddock and doc is not build although I've used previous ./configure; time make -j8.
Anyway, parallel make itself is not good to use here since the build process may also contain some noise of paralellel make fixes and such.
I think more reliable benchmark may be simple build (single-threaded) of ghc-cabal here. I'll see what I can do about that.
OK, so not everything is that bad. Benchmarking compilation of GHC 7.10.1 ghc-cabal tool reveals: GHC 7.6.3: ~12 minutes GHC 7.10.1: ~24 minutes GHC 8.0.1 RC2: ~14 minutes Please note that GHC 7.6.3 compiles 89 files while GHC 7.10.1 and 8.0.1 RC2 compile 90 files. Test done on the same x-gene board like the tests above for the reference... Karel