Slowness (search opens every email file?)
Patrick Totzke
patricktotzke at googlemail.com
Mon Jul 11 14:58:58 PDT 2011
Hi Jason,
On Mon, Jul 11, 2011 at 03:07:21PM -0400, Jason Woofenden wrote:
> notmuch search tag:foo is slow!
>
yes, i've just used the vim ui for the first time and i agreee, its sluggish,
searching for * takes a while.
> (when my e-mail files are not already in the disk cache)
>
> I saw on my activity monitor applet that it was using mostly i/o,
> and started to wonder if it was opening every e-mail. I little work
> with strace and searching revealed that this command was opening
> many many e-mail files from my maildir(s). I spent a little while
> digging around in the notmuch source, and didn't see where it was
> opening the email files.
I cannot reproduce this. I'm no expert, but at least the output of
strace vim -c ":NotMuch" 2>log
does not contain any path that matches that of my maildir.
Also, I wout be surprised if all individual mails would be read,
because for this, a search for all messages feels too fast.
> 2) Do you agree that it should instead get this information from
> the database?
agreed. And If the mail files get read on every search for you,
something is definately going wrong there.
A quick browse through notmuch.vim tells me that
1) it doesn't use notmuchs json output, i think it should, as iirc
this api is considered 'more stable' and is easier to parse than the
default output. More importantly,
2) the output of notmuch is copied into a list. This will of course
be slow if your query matches a lot of messages. Could this be done
by asyncronously writing to the buffer somehow?
best,
/p
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