A valid concern, will installing KNO affect my site speed
The short answer is no.
If you're on Shopify the script is loaded via the “Shopify scripts API”. That means it will load only on the order confirmation screen, and after all core Shopify functionality has loaded.
This is automatic
This is only on the confirmation screen (although there are options to add custom code to other pages)
Zero impact on pre-transaction speed
Essentially zero impact on post-transaction speed as well as it’s loaded after the main page has loaded (plus surveys load in 0.6 seconds on average)