Title: Plugin is causing massive slowdown and CPU load Last modified: August 21, 2016 --- # Plugin is causing massive slowdown and CPU load * Resolved [John Dao](https://wordpress.org/support/users/tiggerlu/) * (@tiggerlu) * [12 years, 6 months ago](https://wordpress.org/support/topic/plugin-is-causing-massive-slowdown-and-cpu-load/) * From my debugging using various profiling tools such as New Relic, the plugin PHP code appears to call apply_filters() close to 2000 times per page request, maxes out the CPU causing each page load to take 30+ seconds. * It doesn’t seem to matter too much if a page is requesting 1 or 200 events, there is some php function that hammers away and eats up CPU like crazy. * I know that people are experiencing this, and I’m hoping the authors have some clue why this is happening. * FYI: This is not happening because of excessive crawls, i have the site on a closed VM. * [http://wordpress.org/plugins/all-in-one-event-calendar/](http://wordpress.org/plugins/all-in-one-event-calendar/) Viewing 6 replies - 1 through 6 (of 6 total) * [Nicola Peluchetti](https://wordpress.org/support/users/nicolapeluchetti/) * (@nicolapeluchetti) * [12 years, 6 months ago](https://wordpress.org/support/topic/plugin-is-causing-massive-slowdown-and-cpu-load/#post-4272876) * Hi, how many events have you in your db?If you have lots, that’s a problem with wordpress and ther way it handles hierarchical posts. Please update to 1.10.9 standard which fixes that. Otherwise the solution could be to use a cache plugin. * Thread Starter [John Dao](https://wordpress.org/support/users/tiggerlu/) * (@tiggerlu) * [12 years, 6 months ago](https://wordpress.org/support/topic/plugin-is-causing-massive-slowdown-and-cpu-load/#post-4272995) * Hi Nicola, * I’m running the latest version of pro, and the site seems to bog down when I have the sidebar widget fetch events in the past “500” days. Changing this to only the last 30 events drastically helps, but obviously it’s a compromise. * I have 169 events in the DB with W3 Total Cache already running, so not that many at the moment. For the time being this seems to be a good stop-gap measure. * [Nicola Peluchetti](https://wordpress.org/support/users/nicolapeluchetti/) * (@nicolapeluchetti) * [12 years, 6 months ago](https://wordpress.org/support/topic/plugin-is-causing-massive-slowdown-and-cpu-load/#post-4273061) * So it’s the widget and i guess it’s the next 500 days 🙂 Anyway the W3TC thing is strange as it should definitely cache the page and the widget like every other thing it caches. As of now i see no different solution to keeping it at 30 days. * Thread Starter [John Dao](https://wordpress.org/support/users/tiggerlu/) * (@tiggerlu) * [12 years, 6 months ago](https://wordpress.org/support/topic/plugin-is-causing-massive-slowdown-and-cpu-load/#post-4273081) * Hi Nicola, * In this case that seemed to have been the issue – of course at the time i wasn’t sure, so I whipped out load-testing tools, PHP profilers and mysql debuggers lol. * But really all i had to do was to normalize the scope of the query from 500 days( might as well be infinite) to something reasonable like 50-100 event objects. * Thanks for your quickly reply, and best of luck. * [juozaswp](https://wordpress.org/support/users/juozaswp/) * (@juozaswp) * [12 years, 6 months ago](https://wordpress.org/support/topic/plugin-is-causing-massive-slowdown-and-cpu-load/#post-4273141) * Most of hosting providers are calculating started php processes. F.e. only two started processes are processed at the real time. All other waits till first two ends. At this case plugin makes site offline, both frontend and backend. * I have 3 eveents per week (period – year). This crashed my site. * So, problem is not solved. Plugin is practically unusable, if I can enter only few events (f.e. month forwarg) only. * How can I solve my problem? This is great plugin, but massive php calls on loading widgets crashes most of sites * [Nicola Peluchetti](https://wordpress.org/support/users/nicolapeluchetti/) * (@nicolapeluchetti) * [12 years, 6 months ago](https://wordpress.org/support/topic/plugin-is-causing-massive-slowdown-and-cpu-load/#post-4273147) * [@juozaswp](https://wordpress.org/support/users/juozaswp/) i see no solution to this, until 2.0 comes out. The only solution is limiting the events on the widget. Viewing 6 replies - 1 through 6 (of 6 total) The topic ‘Plugin is causing massive slowdown and CPU load’ is closed to new replies. * ![](https://s.w.org/plugins/geopattern-icon/all-in-one-event-calendar.svg) * [Timely All-in-One Events Calendar](https://wordpress.org/plugins/all-in-one-event-calendar/) * [Support Threads](https://wordpress.org/support/plugin/all-in-one-event-calendar/) * [Active Topics](https://wordpress.org/support/plugin/all-in-one-event-calendar/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/all-in-one-event-calendar/unresolved/) * [Reviews](https://wordpress.org/support/plugin/all-in-one-event-calendar/reviews/) * 6 replies * 3 participants * Last reply from: [Nicola Peluchetti](https://wordpress.org/support/users/nicolapeluchetti/) * Last activity: [12 years, 6 months ago](https://wordpress.org/support/topic/plugin-is-causing-massive-slowdown-and-cpu-load/#post-4273147) * Status: resolved