⚡ Optimize Navbar scroll listener with requestAnimationFrame #7

2026-01-22T08:24:13Z

google-labs-jules[bot] commented

2026-01-22 08:24:13 +00:00

(Migrated from github.com)

⚡ Performance Optimization: Navbar Scroll Listener

What:
Throttled the scroll event listener in src/components/layout/Navbar.tsx using requestAnimationFrame.

Why:
The previous implementation executed logic and attempted state updates on every scroll event (potentially hundreds per second). This causes unnecessary main thread work. Throttling ensures the logic runs at most once per screen refresh (frame), which is the maximum useful frequency for visual updates.

Measured Improvement:
Created a benchmark test src/components/layout/Navbar.test.tsx that simulates 50 synchronous scroll events.

Baseline (Unthrottled): 50 executions of scroll logic (accessing window.scrollY).
Optimized (Throttled): 1 execution of scroll logic (accessing window.scrollY).
Result: ~98% reduction in unnecessary logic execution during rapid scrolling bursts.

Also fixed a test environment issue in src/hooks/useTypingEffect.test.ts to ensure the full test suite passes.

PR created automatically by Jules for task 16938841465799544697 started by @ragusa-it

⚡ **Performance Optimization: Navbar Scroll Listener** **What:** Throttled the scroll event listener in `src/components/layout/Navbar.tsx` using `requestAnimationFrame`. **Why:** The previous implementation executed logic and attempted state updates on every scroll event (potentially hundreds per second). This causes unnecessary main thread work. Throttling ensures the logic runs at most once per screen refresh (frame), which is the maximum useful frequency for visual updates. **Measured Improvement:** Created a benchmark test `src/components/layout/Navbar.test.tsx` that simulates 50 synchronous scroll events. * **Baseline (Unthrottled):** 50 executions of scroll logic (accessing `window.scrollY`). * **Optimized (Throttled):** 1 execution of scroll logic (accessing `window.scrollY`). * **Result:** ~98% reduction in unnecessary logic execution during rapid scrolling bursts. Also fixed a test environment issue in `src/hooks/useTypingEffect.test.ts` to ensure the full test suite passes. --- *PR created automatically by Jules for task [16938841465799544697](https://jules.google.com/task/16938841465799544697) started by @ragusa-it*

google-labs-jules[bot] commented

2026-01-22 08:24:15 +00:00

(Migrated from github.com)

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👋 Jules, reporting for duty! I'm here to lend a hand with this pull request. When you start a review, I'll add a 👀 emoji to each comment to let you know I've read it. I'll focus on feedback directed at me and will do my best to stay out of conversations between you and other bots or reviewers to keep the noise down. I'll push a commit with your requested changes shortly after. Please note there might be a delay between these steps, but rest assured I'm on the job! For more direct control, you can switch me to **Reactive Mode**. When this mode is on, I will only act on comments where you specifically mention me with `@jules`. You can find this option in the **Pull Request** section of your [global Jules UI settings](https://jules.google.com/settings). You can always switch back! New to Jules? Learn more at [jules.google/docs](https://jules.google/docs). --- *_For security, I will only act on instructions from the user who triggered this task._*

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Reference: ragusa-it/ragusaitweb#7