Idea to improve pdf-tools' performance

[eval-exec]

Hello, I opened a pdf file, and navigate around the pdf file, did a profiler, got this:

     3035178  97% - command-execute
     3035178  97%  - funcall-interactively
     3001478  96%   - pdf-view-scroll-up-or-next-page
     2996873  95%    - pdf-view-next-page
     2996873  95%     - pdf-view-goto-page
     2988526  95%      - pdf-view-redisplay
     2987945  95%       - pdf-view-display-page
     2055259  65%        - pdf-view-create-page
     1910437  61%         - create-image
     1909440  61%          - image--compute-original-map
     1909440  61%           - let*
     1909440  61%            - if
     1909440  61%             - progn
     1909440  61%              - let*
      969872  31%                 image-size
      938573  30%               - /
      938573  30%                - car
      938573  30%                   image-size
         995   0%               - image--compute-rotation
         995   0%                  truncate
      113343   3%         + pdf-cache-renderpage
       28228   0%         + pdf-view-apply-hotspot-functions
        3251   0%         + pdf-view-desired-image-size
      932686  29%        - pdf-view-display-image
      931691  29%         - let
      930695  29%          - if
      930695  29%           - progn
      930695  29%            - let*
      927899  29%               image-size
        1994   0%             - let*
         997   0%              + if
         997   0%              + image-mode-window-put
         802   0%             + floor
         996   0%          + image-mode-window-get
        3694   0%      + apply
        1990   0%      + #<byte-code-function 1D0>
        1707   0%      + pdf-util-pdf-window-p
         956   0%        pdf-view-deactivate-region
        4605   0%    + image-scroll-up
       33700   1%   + evil-collection-pdf-view-goto-first-page
       73443   2% + redisplay_internal (C function)
        8877   0% + timer-event-handler
        1974   0% + winner-save-old-configurations
         998   0%   keycast--update
         997   0% + evil-normal-post-command
         997   0% + evil-repeat-post-hook
         996   0%   evil--jump-handle-buffer-crossing
         659   0% + which-key--hide-popup
           0   0%   ...

I believe we can enhance the performance of pdf-tools by avoiding calls to image-size. What do you think?

[eval-exec]

How about useing magick to get image-size instead of Emacs's image-size function?

magick identify ~/Pictures/1011910.jpg
/home/exec/Pictures/1011910.jpg JPEG 7629x5603 7629x5603+0+0 8-bit sRGB 4.11823MiB 0.000u 0:00.000

I think using magick identify offers better performance. We can use it to get the sizes of thousands of images in a PDF file in parallel.