The mailings screen is very slow to load when there are many campaigns in the database
Opening the mailings screen takes a very long time (~30 seconds in my case), and this also happens on other pages.
On the mailings screen, this loop is used by the campaigns search field, I'm guessing this problem was not noticed elsewhere because my organisation has defined many campaigns (~ 2000).
- Use a database with many campaigns (e.g. 2000)
- Click on Mailings > Sent and scheduled mailings
- Be patient and notice how the browser is stuck while the page loads
Your mileage may vary depending on how fast your computer can redraw repeatedly the page
I have already prepared a fix for it, will PR