Subject: bug#36940: tests slowness and failure after recent Tramp changes

From: Michael Albinus <[email-masked]>
Date: Thu, 08 Aug 2019 16:14:18 +0200

Paul Eggert <[email-masked]> writes:

Hi Paul,

> Thanks, it does fix the failure. However, the test is still quite a
> bit slower for me than you even when I invoke it the way you suggest,
> as it takes 108 seconds for me compared to 30 seconds for you. The
> four slowest tests are:
>
>    passed  37/47  tramp-test35-remote-path (25.712913 sec)
>    passed  42/47  tramp-test41-utf8 (14.036743 sec)
>    passed  17/47  tramp-test12-rename-file (8.772317 sec)
>    passed  16/47  tramp-test11-copy-file (7.754914 sec)

My machine is about 10 years old (Ubuntu 19.04, Intel Core2 Duo T95,
4GB). It runs today

   passed  37/47  tramp-test35-remote-path (4.826182 sec)
   passed  42/47  tramp-test41-utf8 (2.885723 sec)
   passed  17/47  tramp-test12-rename-file (1.725029 sec)
   passed  16/47  tramp-test11-copy-file (1.437843 sec)

But experience has shown, that it easily doubles or triples the time if
there are parallel tasks. It would need more debugging on your machine
in order to understand, where the time is spent.

Best regards, Michael.