If you are testing on your local machine you can set 'QA_DEBUG_PERFORMANCE' to true in qa-config.php and it will show timing at the bottom of every page along with SQL queries and the like.
Besides that check your live website in something like Web Page Test or Google's PageSpeed Insights.
Welcome to the Q&A site for Question2Answer.
If you have a question about Q2A, please ask in English.
To report a bug, please create a new issue on Github or ask a question here with the bug tag.
If you just want to try Q2A, please use the demo site.
July 15, 2020: Q2A 1.8.5 released!