post-new [was: Re: query on a subset of messages ?]

[Sebastien Binet]

Sebastien Binet <binet at cern.ch> writes:

> Jamie,
>
> Jameson Graef Rollins <jrollins at finestructure.net> writes:
>
>> On Mon, Jul 09 2012, Sebastien Binet <binet at cern.ch> wrote:
>>> I was trying to reduce the I/O stress during my usual email
>>> fetching+tagging by writing a little program using the go bindings to
>>> notmuch.
>>>
>>> ie:
>>> db, status := notmuch.OpenDatabase(db_path,
>>>     		notmuch.DATABASE_MODE_READ_WRITE)
>>> query := db.CreateQuery("(tag:new AND tag:inbox)")
>>> msgs := query.SearchMessages()
>>> for _,msg := range msgs {
>>>   tag_msg(msg, tagqueries)
>>> }
>>>
>>>
>>> where tagqueries is a subquery of the form:
>>> [
>>>     {
>>>         "Cmd": "+to-me",
>>>         "Query": "(to:sebastien.binet at cern.ch and not tag:to-me)"
>>>     },
>>>     {
>>>         "Cmd": "+sci-notmuch",
>>>         "Query": "from:notmuch at notmuchmail.org or to:notmuch at notmuchmail.org or subject:notmuch"
>>>     }
>>> ]
>>
>>
>> Hi, Sebastian.  It's really hard for me to believe that this is much
>> faster than simply making the two tagging calls in full:
>>
>> notmuch tag +to-me -- tag:new and tag:inbox and (to:sebastien.binet at cern.ch and not tag:to-me)
>> notmuch tag +sci-notmuch -- tag:new and tag:inbox and from:notmuch at notmuchmail.org or to:notmuch at notmuchmail.org or subject:notmuch"
>>
>> After the first call the cache will be fresh, so the overhead should be
>> minimal.  It looks to me you're looking in to this as a post-new hook.
>> I do pretty much the same thing, and with the above properly constructed
>> searches the tagging is super fast.
>
> well, of course I don't have just those two:
>
> $ grep -He "^tag_new " emacs/notmuch-lib/notmuch-tag.sh | wc -l
> 54
>
> also:
> $ du -hs mail-notmuch/.notmuch 
> 2.9G	mail-notmuch/.notmuch
>
> that said, most of the I/O wait seem to come from 'notmuch new' (after
> having dropped all fs caches.)
>
> ok, post-new hook it is then :)

hum... is post-new supposed to be run even if there is no new message ?

-s
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