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Re: New optimisations for long raw strings in C++ Mode.
From: |
Lars Ingebrigtsen |
Subject: |
Re: New optimisations for long raw strings in C++ Mode. |
Date: |
Sun, 07 Aug 2022 15:34:45 +0200 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/29.0.50 (gnu/linux) |
Alan Mackenzie <acm@muc.de> writes:
> Hmm. Something is different on my setup from yours. After my
> optimisations, I do:
Is this on the current trunk?
> (i) Emacs -Q
> (ii) M-: (setq long-line-threshold nil)
> (ii) C-x C-f ~/long-line.cc RET; This is a file containing a 1MB raw
> string.
> (iii) This loads and displays in somewhere between 1 and 2 seconds.
> (iv) C-x 5 b long-line2.cc RET M-x c++-mode RET
> (v) Type in char long_line [] = R"foo(
> (vi) Type in RET, twice
> (vii) Type in )foo";
Yup.
> (ix) C-x 5 o
> (x) Get the long line into the kill ring, with movement commands and
> M-w.
> (xi) C-x 5 o.
> (xii) Put point on the blank line 2.
> (xiii) C-y.
> (xiv) This takes less than a second to display.
It's still hanging for me after 20s.
> What does your 1MB string look like? Does it contain lots of "s? CC
> Mode needs to search through the yanked line for the first occurrence of
> )foo", which is why it is not instantaneous. It also has to put a
> syntax-table text property on each " which isn't the terminating )foo",
> which is another reason it's not instantaneous.
The string I'm yanking is just 1MB worth of x and y characters (and no
spaces or anything).
- New optimisations for long raw strings in C++ Mode., Alan Mackenzie, 2022/08/06
- Re: New optimisations for long raw strings in C++ Mode., Lars Ingebrigtsen, 2022/08/07
- Re: New optimisations for long raw strings in C++ Mode., Alan Mackenzie, 2022/08/07
- Re: New optimisations for long raw strings in C++ Mode.,
Lars Ingebrigtsen <=
- Re: New optimisations for long raw strings in C++ Mode., Alan Mackenzie, 2022/08/07
- Re: New optimisations for long raw strings in C++ Mode., Lars Ingebrigtsen, 2022/08/07
- Re: New optimisations for long raw strings in C++ Mode., Lars Ingebrigtsen, 2022/08/07
- Re: New optimisations for long raw strings in C++ Mode., Alan Mackenzie, 2022/08/07
- Re: New optimisations for long raw strings in C++ Mode., Eli Zaretskii, 2022/08/07
- Re: New optimisations for long raw strings in C++ Mode., Alan Mackenzie, 2022/08/09
- Re: New optimisations for long raw strings in C++ Mode., Lars Ingebrigtsen, 2022/08/09
- Re: New optimisations for long raw strings in C++ Mode., Lars Ingebrigtsen, 2022/08/09
- Re: New optimisations for long raw strings in C++ Mode., Alan Mackenzie, 2022/08/09
- Re: New optimisations for long raw strings in C++ Mode., Eli Zaretskii, 2022/08/09