How to improve the running speed

After using the katalon recoder for a few months, and then using katalon studio, I found that the execution speed is very slow, and the execution of a simple use case is particularly time-consuming. Can the execution speed be changed like the recoder?

There are so many factors that could make your test run slow. You should look into the logs etc and eliminate which portion of your test execution takes long time. It is difficult for guys in the forum to help you unless you look at your project in more detail and provide enough information.