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Bad performance because of too much calendar entries?

Posted: Wed May 06, 2015 4:02 pm
by wptsv
I have been using "Calendar for WordPress" for 4 years now. It contains 800 entries now, 90 % of them in the past. I am observing quite often long times for opening the calendar or changing the month - opening times which are more than 10 times longer than for opening other WordPress pages or posts. Are many calendar entries increasing opening times of calendar pages? If yes, is there a chance to get rid of old calendar entries other than deleting them one by one? If no, what else could be the reason for bad performance?