GHC build time graphs
rwbarton at gmail.com
Fri Feb 12 20:02:30 UTC 2016
On Tue, Feb 9, 2016 at 11:20 AM, Karel Gardas <karel.gardas at centrum.cz>
> On 01/28/16 11:34 PM, Ben Gamari wrote:
>> Joachim Breitner <mail at joachim-breitner.de> writes:
>> Hi Oleg,
>>> Am Freitag, den 29.01.2016, 00:22 +0200 schrieb Oleg Grenrus:
>>>> Is the same compiler used to build HEAD and 7.10,1?
>>> Good call. In fact, no: 7.10.1 is built with 7.6.3, while HEAD is built
>>> with 7.10.3.
>>> Anthony’s link, i.e.
>>> has links to the build logs of either build; there I could find that
>>> That might be (part) of the problem. But if it is, it is even worse, as
>>> it would mean not only building the compiler got slower, but the
>>> compiler itself...
>>> I can verify that the build itself is indeed slower. Validating the
>> current state of ghc-7.10 takes 19 minutes, whereas ghc-8.0 takes 25.5
>> minutes. This isn't entirely unexpected but the change is quite a bit
>> larger than I had thought. It would be nice to know which commits are
> 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.
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