# Runtime performance
The runtime performance of the Mini Program directly determines the user's experience when using the Mini Program function. If the runtime performance problems, it is easy to appear page scrolling stuttering, response delay and other issues, affecting the user. If the memory usage is too high, there will be black screen, flash back and other problems.
Before optimizing runtime performance, it is recommended that developers first understand the Mini Program'sOperating environmentandOperational mechanism。
Developers can start by optimizing startup performance in the following ways: