On 17 Nov 2017, at 18:46, Ben Gamari wrote:
> Simon Peyton Jones via ghc-devs <[email protected]> writes:
>
>> Urk! I expected Hadrian to be faster because it has more accurate
>> dependencies.
>>
> While this is just speculation, this might actually be one of the
> reasons why the no-op case is slower: in make's case the dependency
> graph is mostly static whereas in Hadrian the build system needs to
> discover dependencies dynamically.
>
> Either way, thanks for this characterization, Herbert!
But surely the timing for a full build from scratch is not the most important
thing to compare? In my work environment, full builds are extremely rare; the
common case is an incremental build after pulling changes from upstream. Is
this something you can measure?
Regards,
Malcolm
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