find threads where I and Jian participated but not Dave

[Matt Armstrong]

Daniel Kahn Gillmor <dkg at fifthhorseman.net> writes:

> On Wed 2017-06-21 13:04:53 -0700, Matt Armstrong wrote:
>> For what it is worth, I've found this idea from Daniel intriguing and
>> pretty useful in practice:
>>
>>   "show me threads in which i've participated, where there are some
>>    messages flagged with 'inbox'"
>>
>> I implement it like this in my post-new hook:
>>
>>     # All messages in threads in which I participate get tag:participated
>>     notmuch search --output=threads from:marmstrong | \
>>       sed -e 's,^,+participated -- ,' | \
>>       notmuch tag --batch
>
> cool, thx for the suggestion.
>
> the "notmuch search" part of the pipeline alone takes ~19s (wall time,
> and actual CPU time) for me though :/  It returns 30504 threads!  how
> many threads do you get?

The query returns 6600 threads.  I'm getting 2 seconds wall clock time.


> you're effectively re-tagging every single message in every participated
> thread every time you run "notmuch new", right?

Yeah, the "batch script" that the above search+sed creates and pipes
into "notmuch tag --batch" is 265K, but it only takes 0.5 seconds to
execute.  My understanding is that "notmuch tag" is smart enough to do
no work if the tag is already present on a message, so the only changes
happening in the database are actually for new stuff.