I just finished testing scrapers for Kodi v20, make of the results what you will...
TVShows
Movies
Both using sample library here on the wiki.
TVShows
TVShow scraping speed test (20 tvshows, 1,273 episodes)
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The Movie DataBase (XML) - 02mins 33secs (153 secs total)
XEM (XML) - 04mins 32secs (272 secs total)
TMDB TVShows (Python) - 08mins 25secs (505 secs total)
TVMaze (Python) - 10mins 39secs (639 secs total)
The TVDB v4 (Python) - 19mins 14secs (1,154 secs total)
The TVDB New (Python) - 29mins 24secs (1,764 secs total)
* Tested using latest Kodi v20 nightly, default scraper options.
Movies
est setup - Latest Nightly. 997 movies. Local artwork pre downloaded, default settings
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TMDB Movie (Python) - 12min 01sec
TMDB Movie (XML) - 12min 43sec
Universal Movie Scraper - 1hr 21min 44sec
Both using sample library here on the wiki.