Identify and eliminate computational work that serves no purpose, particularly for inactive, hidden, or irrelevant elements. This includes early returns for non-visible components, lazy initialization of expensive resources, and preventing work during inappropriate timing. Key strategies: - **Early returns for inactive elements**: Skip processing for hidden webviews, unfocused components, or elements that won't affect the final result - **Lazy resource creation**: Defer expensive object creation until actually needed, not at declaration time - **Conditional processing**: Check visibility, focus state, or relevance before performing expensive operations - **Timing-aware operations**: Avoid recursive or redundant work during update cycles Example from display list processing: ```rust // Before: Always process display lists fn handle_display_list(&mut self, webview_id: WebViewId, display_list: DisplayList) { self.process_display_list(webview_id, display_list); } // After: Skip processing for hidden webviews fn handle_display_list(&mut self, webview_id: WebViewId, display_list: DisplayList) { if !self.webview_renderers.is_shown(webview_id) { return debug!("Ignoring display list for hidden webview {:?}", webview_id); } self.process_display_list(webview_id, display_list); } ``` Example from variable initialization: ```rust // Before: Create display immediately let display = path.display(); if some_condition { println!("Error with {}", display); } // After: Create display only when needed if some_condition { let display = path.display(); println!("Error with {}", display); } ``` This optimization prevents wasted CPU cycles, reduces memory pressure, and improves overall application responsiveness by ensuring computational resources are only used when they contribute to meaningful work.