tree 942ee6714f678636fe06c2d2ae4f4ac3536e584b
parent 7567bdf653f13a01d4e5b5112c6e1a7a0da943f7
author Daniel Latypov <dlatypov@google.com> 1659988238 +0000
committer Daniel Latypov <dlatypov@google.com> 1659989119 +0000

get_metrics: rewrite in Python, refactor output a bit

The script has gotten slow because of the test authors check.
It feels like the # of test files (i.e. inputs to git log) causes the
time to explode.

In commit, 82a75278c4c6 ("get_metrics.sh: use git-grep to cut runtime by
>70%"), I'd reduced the overall script runtime to 9s. Now it's more
like 20s :(

We'll probably need to do some more clever tricks to make this more
bearable as KUnit grows, so let's use a real programming language.

This change also
* changes output order to print the slow test authors result last
* makes sure we exclude internal contributors from contributor count,
  not just the contribution patch count.
* no longer assumes we're running the script from inside the Linux tree
  (probably using it from your checkout of this repo)

Before:
$ <path>/get_metrics.sh | ts -s '%M:%.S'
00:17.747701 Unique contributors:       35
00:17.747838 Number of patches: 73
00:17.747866 Number of total tests:     55
00:17.747879 Number of test authors:    93
00:17.747891 Number of test cases:      494

After:
$ python3 -u <path>/get_metrics.py | ts -s '%M:%.S'
00:04.278519 Number of test cases: 494
00:04.278704 Number of patches: 73
00:04.278722 Unique contributors: 30
00:04.278733 Number of total tests: 55
00:15.614618 Number of test authors: 93

I.e. we get most of the results within 4s and also see some small speed
benefits to doing our output processing in Python.

Signed-off-by: Daniel Latypov <dlatypov@google.com>
Change-Id: Iffb2baf2294bc4f56e3739b50e1ac4ea45a13e6b