why does mutt take so long to load my python folder?

[Cameron Simpson]

On 15Nov2022 20:10, Kevin J. McCarthy <kevin at 8t8.us> wrote:
>>That `cur` message file dates from 2021-07-15 17:36:10 GMT (long ago) 
>>and the temporary file is indeed temporary - it vanishes. I speculate 
>>that mutt's... unpacking the source message in some way?
>
>Seems likely, but off the top of my head I can't guess what's doing it.  
>[...]

Thanks for the response. I've been experimenting tonight.

It isn't the sort. As you suggest, it is in a process after the sort.

Starting with an empty config except for a header cache dir setting, I 
notices a distinct slowdown of the scan at about 80%. Odd. So I moved 
the cache sideways and let it rebuild:

     43869952 18 Nov 20:43 02a1cc9292e0222624346e5ff8742f34
     73852160 18 Nov 20:09 02a1cc9292e0222624346e5ff8742f34-ASIDE

This brought a nice linear scan.

At this point the folder loads pretty promptly.

Turning on my normal settings including sort made no difference, still 
nice and fast. Even my macros to collapse/uncollapse certain patterns 
seem basicly free.

So I started adding back in my config files (I source a few). Here's the 
glaring one:

     source ~/rc/mutt/aliases-auto

8407 aliases, nearly 2MB in size :-)

Really, it is a bit excessive. Particularly since I think I don't ever 
use aliases anyway.

With that commented out the python folder's still nice and fast.

What's weird to me is that the effect it has seems dependent on the 
folder I choose. Reading the file itself doesn't seem to slow; it seems 
to be some interaction with the folder.

Cheers,
Cameron Simpson <cs at cskk.id.au>