Plugin slowing home page

Hello,

I am working on some bottlenecks, and doing some optimizations on my WP website; I am very interested in reducing time load of web pages, so I’m testing each plugin installed and now it’s your turn ??

Using Query Monitor, I noticed that sometimes (i.e I suppose via WP cron-job) this function is called:

Psn_Notification_Postponed->_getAll()

and this seem to slow home page just sometimes… so I would ask if there is a way to improve this and /or make available an options for changing it (i.e making less frequent).

Hope my question is clear, thanks in advance!