[Monotone-devel] Issue 120 - list changed much slower than status (monotone)

[code]

Hello,

A new issue has been created and assigned
to you:

120 - list changed much slower than status
Project: monotone
Status: New
Reported by: joe 23
Labels:
 Type:Defect
 Priority:Medium

Description:

It seems like 'list changed' is the same as 'status' but with a different 
output format. However, 'list changed' takes much longer, when a small portion 
of the total workspace is specified. With a decent-sized project, the delay of 
'list changed' is mildly annoying.

My guess is that 'status' only checks the portion of the workspace specified, 
but 'list changed' checks the whole workspace and then filters the result?

Of course if there's some good reason why it must be slower, please close the 
ticket.

Thanks!

Steps to reproduce the problem:
-------------------------------

1. time mtn list changed path/to/some/dir
2. time mtn status path/to/some/dir
3. repeat 1) and 2) now that the OS has cached things

Expected result:
----------------
Both take about the same CPU and elapsed time

Actual results:
---------------
list changed takes about 4x as long as status, and is noticeably slower to 
complete.


Output of `mtn version --full`:
-------------------------------
0.99.1

--
Issue: https://code.monotone.ca/p/monotone/issues/120/