[Bug 2009544] Re: OpenSSL 3 performance regression

[Rafael Lopez]

The perf regression is easy to demonstrate using the 'main.py' script
attached to this bug, also available here:
https://pastebin.ubuntu.com/p/XzV766BpHd/

Some results -

ubuntu at focal-vm:~$ /usr/bin/time -f "\n\nElapsed: %e s" python3 main.py
Distro: Ubuntu 20.04.6 LTS
Python Version: 3.8.10 (default, May 26 2023, 14:05:08)
[GCC 9.4.0]
OpenSSL Version: OpenSSL 1.1.1f  31 Mar 2020
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99

Elapsed: 1.65 s

root at jammy-vm:~# /usr/bin/time -f "\n\nElapsed: %e s" python3 main.py
Distro: Ubuntu 22.04.2 LTS
Python Version: 3.10.6 (main, May 29 2023, 11:10:38) [GCC 11.3.0]
OpenSSL Version: OpenSSL 3.0.2 15 Mar 2022
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99

Elapsed: 5.91 s

Both the above tests were done on a 1core/1G VM. Interestingly, when
adding resources it exacerbates the problem, example using 8core/4G VMs
(same hardware):

ubuntu at sslfocal-vm1:~$ /usr/bin/time -f "\n\nElapsed: %e s" python3 main.py
Distro: Ubuntu 20.04.6 LTS
Python Version: 3.8.10 (default, May 26 2023, 14:05:08)
[GCC 9.4.0]
OpenSSL Version: OpenSSL 1.1.1f  31 Mar 2020
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99

Elapsed: 1.77 s

ubuntu at ssljammy-vm1:~$ /usr/bin/time -f "\n\nElapsed: %e s" python3 main.py
Distro: Ubuntu 22.04.2 LTS
Python Version: 3.10.6 (main, May 29 2023, 11:10:38) [GCC 11.3.0]
OpenSSL Version: OpenSSL 3.0.2 15 Mar 2022
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99

Elapsed: 12.69 s

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https://bugs.launchpad.net/bugs/2009544

Title:
  OpenSSL 3 performance regression

Status in openssl package in Ubuntu:
  Confirmed

Bug description:
  Hello, it sounds like there's some significant performance regressions
  in OpenSSL 3:

  https://github.com/openssl/openssl/issues/20286#issuecomment-1438826816

  Some we might be able to address with:
  https://github.com/openssl/openssl/pull/18151

  Some of the performance differences may be subject to ongoing work.

  Thanks

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