改关的关
选项含义解释：
详细解决方案汇总
- Method breakpoints will slow down debugger a lot because of the JVM design, they are expensive to evaluate. Remove method breakpoints and consider using the regular line breakpoints. To verify that you don’t have any method breakpoints open .idea/workspace.xml file in the project root directory (or <project>.iws file if you are using the old project format) and look for any breakpoints inside the method_breakpoints node.
- Watch method return values option is enabled in the Debugger tool window. Try disabling this option to improve the performance.
- Enable alternative views for Collections classes and Enable toString()’ object view options enabled in Settings (Preferences on macOS) | Build, Execution, Deployment | Debugger | Data Views. If toString() methods take a long time to complete, disable this option. Note that custom toString() methods can also change the semantics of the application when running under debugger in case the code inside these methods changes the state of your application.
- Memory tab in the debugger toolwindow. It is updated on every debugger stop, try to minimize it to improve stepping performance.
- Settings (Preferences on macOS) | Build, Execution, Deployment | Debugger | Data Views | Editor | Show values inline. Disable to improve performance.
- Settings (Preferences on macOS) | Build, Execution, Deployment | Debugger | Data Views | Java | Predict condition values and exceptions based on data flow analysis. Disable to improve performance.
- Enable Mute Renderers option in the Debug tool window Variables view context menu.
参考：
https://intellij-support.jetbrains.com/hc/en-us/articles/-Java-slow-performance-or-hangups-when-starting-debugger-and-stepping
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