Tell me why does not it take so long to load a picture in my profile?

Please see https://help.imdb.com/article/contribution/contribution-information/when-will-my-update-be-added/GEK...

However, if you are referring to https://contribute.imdb.com/updates/update?load=171215-154119-054000 note this was processed on the same day it was submitted and is already live at http://www.imdb.com/name/nm9488154/externalsites

It sounds like you are looking to add a headshot to your name page and search results? If so, such uploads are almost instant but an IMDbPro subscription is required -> https://help.imdb.com/article/imdbpro/manage-your-imdb-page/how-do-i-add-and-edit-images-on-my-imdb-...