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bug#65491: [PATCH] Improve performance allocating vectors
From: |
Ihor Radchenko |
Subject: |
bug#65491: [PATCH] Improve performance allocating vectors |
Date: |
Sat, 26 Aug 2023 08:07:29 +0000 |
Ihor Radchenko <yantar92@posteo.net> writes:
> Do you mean something like scrolling performance when scrolling a large
> Arabic/Korean text file?
I downloaded Quran from https://tanzil.net/download/, opened it Emacs
like
$ perf record ./src/emacs -Q ~/Downloads/quran-simple-plain.txt
and scrolled the buffer with PgDown all the way to the bottom.
It does not look like allocation vectors is all that heavy here
(compared to the edge case with fib.el with bignums).
without the patch:
10.14% emacs emacs [.]
process_mark_stack
3.79% emacs emacs [.]
sub_char_table_ref
3.68% emacs emacs [.]
x_draw_glyph_string
2.75% emacs libc.so.6 [.]
pthread_mutex_lock
1.75% emacs libc.so.6 [.]
0x0000000000088b0a
-> 1.41% emacs emacs [.]
allocate_vectorlike
1.30% emacs emacs [.] sweep_vectors
1.27% emacs emacs [.] char_table_ref
with the patch
9.97% emacs emacs [.]
process_mark_stack
4.30% emacs emacs [.]
x_draw_glyph_string
3.58% emacs emacs [.]
sub_char_table_ref
2.66% emacs libc.so.6 [.]
pthread_mutex_lock
1.87% emacs libc.so.6 [.]
0x0000000000088b0a
1.29% emacs emacs [.] sweep_vectors
1.22% emacs emacs [.] face_for_font
1.17% emacs emacs [.] char_table_ref
...
-> 0.26% emacs emacs [.]
allocate_vectorlike
1.41% down to 0.26% ~5x speedup.
--
Ihor Radchenko // yantar92,
Org mode contributor,
Learn more about Org mode at <https://orgmode.org/>.
Support Org development at <https://liberapay.com/org-mode>,
or support my work at <https://liberapay.com/yantar92>
bug#65491: [PATCH] Improve performance allocating vectors, Mattias EngdegÄrd, 2023/08/26
bug#65491: [PATCH] Improve performance allocating vectors, Stefan Monnier, 2023/08/27