"Issue with Virtualization using react-window and VirtualScroller in PrimeReact Accordion"

[patilhande10]

Hello PrimeReact Support Team,

I’m currently working on implementing virtualization in my application using react-window, useMemo & VirtualScroller in conjunction with the accordion component in PrimeReact. However, I am encountering issues where the virtualization is not working as expected.

##Problem:
Despite using useMemo, react-window, and VirtualScroller, the accordion component does not seem to properly render or virtualize the content. The expected performance improvements from virtualization (especially with large datasets) are not being realized.

#Here’s the context of my implementation:

1. I have a list of conversations grouped by date, and I am rendering them inside an accordion component.
2. I applied VirtualScroller and react-Window to virtualize the conversations, but it does not show the expected virtualization effect (e.g., only rendering the visible items within the scrollable area).
3. I’m using AccordionTab components for each filter category and rendering the conversation items within them.
4. The issue persists even after using useMemo for optimization.

#Steps I’ve Taken:

1. Used react-window and virtual scroller in the accordion tab.
2. Applied useMemo for optimized rendering of conversation items.
3. Used the onTabChange and activeIndex to dynamically load filtered data in the accordion.

#Expected Behavior:

1. The content inside each accordion tab should be virtualized and only render the visible items, reducing the rendering time and improving performance.
2. When scrolling through the list of conversations, only the visible items should be rendered, not the entire list.

#Current Behavior:

1. The accordion component does not properly virtualize the content as expected. It still renders the entire list of conversations, even if only a subset is visible.

#Could you provide any guidance on how to properly implement virtualization with Accordion, react-window, useMemo and VirtualScroller in this case?

Thank you for your assistance!