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Re: File path completions: strange speed discrepancy
From: |
Michael Albinus |
Subject: |
Re: File path completions: strange speed discrepancy |
Date: |
Sun, 19 Sep 2021 18:55:58 +0200 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) |
JD Smith <jdtsmith@gmail.com> writes:
Hi,
> Thanks very much for this much improved testing code (which also saves
> the tedium of slowly retyping!). I altered it slightly to include a
> few more function, and target my local wired server:
>
> (progn
> (require 'tramp-sh)
> (tramp-cleanup-all-connections)
> (elp-instrument-list '(file-exists-p completing-read
> read-file-name-internal read-file-name-default
> tramp-handle-file-name-completion
> tramp-sh-handle-file-name-all-completions))
> (setq unread-command-events (mapcar 'identity
> "///ssh:datpi:/home/pi/no\tex\t/do\tma\tce\t\n"))
> (call-interactively #'find-file)
> (elp-results)
> (elp-reset-all))
I've applied the same, except the remote file name.
My timing results (emacs -Q, v28.0.50):
>From *scratch*:
read-file-name-default 1 9.064781548 9.064781548
completing-read 1 9.057834631 9.057834631
tramp-handle-file-name-completion 3 8.331385864
2.7771286213
tramp-sh-handle-file-name-all-completions 4 7.290909892 1.822727473
file-exists-p 45 1.7296832099
0.0384374046
read-file-name-internal 13 0.4099991600
0.0315383969
>From remote dired:
read-file-name-default 1 8.23891833 8.23891833
completing-read 1 8.228419034 8.228419034
tramp-handle-file-name-completion 3 7.4998795480
2.4999598493
tramp-sh-handle-file-name-all-completions 4 6.463144493
1.6157861232
file-exists-p 45 1.6901479139
0.0375588425
read-file-name-internal 13 0.3952138859
0.0304010681
> So really only very little difference inside the tramp completion
> functions; they seem to be doing the same job independent of the
> starting point. But the completing-read itself, which is where
> find-file is spending its time, is taking 8x longer! And
> read-file-name-internal is 35x slower. Do you find this as well?
> I’ll dig a bit deeper and see if I can narrow it down further.
With Emacs 28, the differences aren't so relevant. The absolute time is
much higher than in your case, but I have taken "savannah" as test host
which is "far from me".
Do you have a chance to compile Emacs from git, and run the test?
Best regards, Michael.
- File path completions: strange speed discrepancy, JD Smith, 2021/09/17
- Re: File path completions: strange speed discrepancy, Michael Albinus, 2021/09/18
- Re: File path completions: strange speed discrepancy, JD Smith, 2021/09/18
- Re: File path completions: strange speed discrepancy, Michael Albinus, 2021/09/18
- Re: File path completions: strange speed discrepancy, JD Smith, 2021/09/18
- Re: File path completions: strange speed discrepancy, Michael Albinus, 2021/09/18
- Re: File path completions: strange speed discrepancy, Michael Albinus, 2021/09/19
- Re: File path completions: strange speed discrepancy, JD Smith, 2021/09/19
- Re: File path completions: strange speed discrepancy,
Michael Albinus <=
- Re: File path completions: strange speed discrepancy, JD Smith, 2021/09/19
- Re: File path completions: strange speed discrepancy, Michael Albinus, 2021/09/20
- Re: File path completions: strange speed discrepancy, JD Smith, 2021/09/20
- Re: File path completions: strange speed discrepancy, JD Smith, 2021/09/20
- Re: File path completions: strange speed discrepancy, Michael Albinus, 2021/09/21
- Re: File path completions: strange speed discrepancy, JD Smith, 2021/09/21
- Re: File path completions: strange speed discrepancy, Michael Albinus, 2021/09/21
- Re: File path completions: strange speed discrepancy, JD Smith, 2021/09/21
- Re: File path completions: strange speed discrepancy, Michael Albinus, 2021/09/22
- Re: File path completions: strange speed discrepancy, JD Smith, 2021/09/24