> On Apr 11, 2019, at 7:31 AM, Boris Kolpackov <boris_at_codesynthesis.com> wrote:
>
> Nathan Sidwell <nathan_at_acm.org> writes:
>
>>> On 4/11/19 10:17 AM, Boris Kolpackov wrote:
>>>
>>> What if it's not Boost but my own headers?
>>
>> Why are you changing headers you don't include?
>
> I do include them.
>
> My point is I don't think the assumption that header
> units will only be used with headers that rarely
> change (and therefore can be handled with a "total
> precompile") is valid.

Hmm, I don’t get it.

Header units are nothing but formalization of PCHs. The long standing tradition, practice and recommendation is that you put in PCHs only stuff that rarely change - at least for the inner loop of development. Do you have new data that would invalidate that recommendation?

— Gaby


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