Re: How to measure frame rate in fps?

[Dmitry Gutov]

On 02.06.2021 05:29, Eli Zaretskii wrote:
> Maybe run Emacs under 'perf' and see which GTK API call(s) take(s)
> most of those milliseconds?

I'm not sure if I've been doing it right, but the gtk functions seem to 
be taking pretty much none of the runtime:

   0,00%  emacs  libgtk-3.so.0.2404.16  [.] gtk_widget_get_direction
   0,00%  emacs  libgtk-3.so.0.2404.16  [.] gtk_widget_get_type 

   0,00%  emacs  libgtk-3.so.0.2404.16  [.] gtk_style_context_get_property
   0,00%  emacs  libgtk-3.so.0.2404.16  [.] gtk_get_event_widget
   0,00%  emacs  libgtk-3.so.0.2404.16  [.] gtk_style_context_get_type
   0,00%  emacs  libgtk-3.so.0.2404.16  [.] gtk_toolbar_get_type

The leaders looked like:

  28,52%  emacs         emacs                       [.] mark_object 

   6,87%  emacs         emacs                       [.] assq_no_quit 

   3,45%  emacs         emacs                       [.] mark_char_table 

   3,37%  emacs         emacs                       [.] sweep_strings 

   2,84%  emacs         emacs                       [.] boyer_moore 

   1,82%  emacs         emacs                       [.] 
pdumper_marked_p_impl
   1,80%  emacs         emacs                       [.] 
re_match_2_internal
   1,69%  emacs         emacs                       [.] 
lookup_char_property
   1,57%  emacs         emacs                       [.] 
set_buffer_internal_2
   1,54%  emacs         emacs                       [.] eval_sub 

   1,42%  emacs         emacs                       [.] Fassq 

   1,41%  emacs         emacs                       [.] sweep_conses 

   1,33%  emacs         emacs                       [.] sweep_vectors 

   1,02%  emacs         emacs                       [.] exec_byte_code 

   0,97%  emacs         emacs                       [.] mark_vectorlike 

   0,95%  emacs         emacs                       [.] next_interval 

   0,92%  emacs         emacs                       [.] find_interval 

   0,79%  emacs         libc-2.31.so                [.] 
__memmove_avx_unaligned_erms
   0,64%  emacs         emacs                       [.] 
pdumper_set_marked_impl
   0,62%  emacs         libc-2.31.so                [.] malloc 

   0,62%  emacs         emacs                       [.] Fcons 

   0,61%  emacs         libc-2.31.so                [.] _int_malloc 

   0,58%  emacs         emacs                       [.] 
gui_produce_glyphs
   0,52%  emacs         emacs                       [.] list_length 

   0,49%  emacs         emacs                       [.] Ffuncall 

   0,46%  emacs         emacs                       [.] Fcdr 

   0,42%  emacs         libpthread-2.31.so          [.] 
__pthread_mutex_unlock
   0,40%  emacs         emacs                       [.] 
scan_sexps_forward
   0,40%  emacs         libpthread-2.31.so          [.] 
__pthread_mutex_lock
   0,38%  emacs         emacs                       [.] 
allocate_vectorlike
   0,36%  emacs         libcairo.so.2.11600.0       [.] 
cairo_scaled_font_text_to_glyphs
   0,36%  emacs         emacs                       [.] 
composition_compute_stop_pos
   0,35%  emacs         emacs                       [.] 
bidi_resolve_explicit
   0,35%  emacs         emacs                       [.] 
get_next_display_element
   0,35%  emacs         emacs                       [.] Fplist_get 

   0,34%  emacs         libc-2.31.so                [.] _int_free 

   0,33%  emacs         emacs                       [.] Faref 

   0,33%  emacs         emacs                       [.] 
move_it_in_display_line_to
   0,32%  emacs         emacs                       [.] 
balance_an_interval
   0,32%  emacs         emacs                       [.] get_keymap 

   0,29%  emacs         emacs                       [.] 
do_symval_forwarding
   0,28%  emacs         emacs                       [.] 
set_default_internal
   0,26%  emacs         emacs                       [.] hash_lookup 

   0,26%  emacs         emacs                       [.] 
vectorlike_nbytes
   0,25%  emacs         emacs                       [.] 
rpl_re_compile_pattern
   0,25%  emacs         emacs                       [.] json_to_lisp 

   0,25%  emacs         emacs                       [.] 
bidi_level_of_next_char
   0,24%  emacs         libc-2.31.so                [.] 
malloc_consolidate
   0,23%  emacs         emacs                       [.] 
bidi_resolve_weak
   0,23%  emacs         emacs                       [.] 
find_automatic_composition
   0,23%  emacs         emacs                       [.] grow_specpdl 

   0,23%  emacs         emacs                       [.] mark_compiled