Steps to reproduce:
- Open a page with hundreds of refs, e.g., https://en.wikipedia.org/wiki/COVID-19_vaccine?veaction=edit§ion=22
- Try to re-use a ref by searching for a relevant keyword, e.g., last or news.
- Wait for about three minutes.
- Get your result.
Once it's processed the refs, it's much faster. It's just the initial search that takes so long.
Can be tested on beta:
https://en.wikipedia.beta.wmflabs.org/wiki/COVID-19_vaccine?veaction=edit