Does this plugin slowed the site speed?

No, we have a quick load speed, everything is CSS and Javascript, no image are used,also we do not use a lot of DOM, our algorithm make everything running quickly.

In wordpress tooltips pro plus version, we have used many methods to optimize the page loading speed of WordPress and tooltip, for example: we move all inline javascript code of tooltip term in a static javascript file to speed up page load speed, we load tooltips js codes / directory js codes / in wordpress footer, we move inline css code of tooltip in static css file to speed up wordpress pages automatically…etc

please check our detailed document at:

Improved tooltip performance optimization module which automatically optimize the loading speed and performance of wordpress post in WordPress Tooltips Pro Plus 25.1.8

How to Move all inline javascript code of tooltip term in a static javascript file to speed up page load speed? Supported by wordpress tooltips pro plus 20.4.8

Optimized WordPress tooltip running speed, wordpress tooltips pro plus 25.0.8

Rewrote the summary function to improve page load speeds, wordpress tooltips pro plugin 18.5.6

WordPress Tooltips Pro Plugin 15.5.2 Released, Increase Loading Speed of WordPress Pages

WordPress Tooltips Plugin 9.7.2, Optimized Code to Speed up Your Page Load Time

…and more