⚡ Optimize GradientBlinds pointer move handler #15

2026-01-24T10:02:33Z

google-labs-jules[bot] commented

2026-01-24 10:02:33 +00:00

(Migrated from github.com)

💡 What:
Optimized the GradientBlinds component by removing a synchronous getBoundingClientRect() call from the pointermove event handler.

🎯 Why:
Calling getBoundingClientRect() inside a high-frequency event handler like pointermove forces the browser to synchronously recalculate layout (reflow) on every frame, which can cause significant performance degradation and jank, especially on lower-end devices or when the page has complex layout.

📊 Measured Improvement:

Baseline: The component called getBoundingClientRect on every pointermove event.
Improvement: The component now calls getBoundingClientRect only when the element resizes (via ResizeObserver).
Verification: Added a test case minimizes getBoundingClientRect calls during pointer move which confirms that getBoundingClientRect is NOT called during pointer movement. The position is calculated using cached dimensions and compensating for window scroll delta.

PR created automatically by Jules for task 11693170314543928560 started by @ragusa-it

💡 **What:** Optimized the `GradientBlinds` component by removing a synchronous `getBoundingClientRect()` call from the `pointermove` event handler. 🎯 **Why:** Calling `getBoundingClientRect()` inside a high-frequency event handler like `pointermove` forces the browser to synchronously recalculate layout (reflow) on every frame, which can cause significant performance degradation and jank, especially on lower-end devices or when the page has complex layout. 📊 **Measured Improvement:** - **Baseline:** The component called `getBoundingClientRect` on every `pointermove` event. - **Improvement:** The component now calls `getBoundingClientRect` only when the element resizes (via `ResizeObserver`). - **Verification:** Added a test case `minimizes getBoundingClientRect calls during pointer move` which confirms that `getBoundingClientRect` is NOT called during pointer movement. The position is calculated using cached dimensions and compensating for window scroll delta. --- *PR created automatically by Jules for task [11693170314543928560](https://jules.google.com/task/11693170314543928560) started by @ragusa-it*

google-labs-jules[bot] commented

2026-01-24 10:02:34 +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#15