kodi 21.0 – Why adding videos from nfo' is slower for movies than for tvshows

I’m posting here because I didn’t find the section for “metadata.local”. If a moderator reads me could he move it to the right section. Thank you.

I made a comparison of elapsed time for adding 71 movies and 44 tvshows containing 453 episodes.
Each video is in its folder.

tvshow:

for the 71 movies the scrape took 13 minutes and 12 seconds for the analysis and caching of 2530 images.
for the 44 tvshows  and 453 episodes the scrape took 14 minutes for the analysis and caching of 4046 images.

So why adding videos from nfo’ is slower for movies than for tvshows.
Thanks for reading.