The events component in a screen is slow to generate because of an inefficient query on the MySQL database. An event list of the last 10 items takes about 5 seconds to generate.

I checked the MySQL query log and saw that Zabbix executes a very large statement on the database and verified that this statement is the statement that takes a while to finish. See attached query.txt. The entire query is 14kb ! I suspect this could be done more efficiently, to speed up the GUI's response.