Re: [RFC] On watchman support

David Turner [off-list ref] writes:

On Tue, 2014-11-18 at 12:55 -0800, Junio C Hamano wrote:

quoted

I vaguely recall that the reason why we dropped it was because it
was too much code churn in an area that was being worked on in
parallel, but you may need to go back to the list archive for
details.

OK, in that case I'll try to remember to reroll it once the rest of the
refs stuff lands.

Sure.  But I would much prefer to see us explore an arch independent
optimisation of the caller before starting to micro-optimize a leaf
function.  

It is not check_refname_format() that is the real problem. It's the
fact that we do O(# of refs) work whenever we have to access the
packed-refs file. check_refname_format() is part of that, surely,
but so is reading the file, creating all of the refname structs in
memory, etc. (credit to peff@).