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System Design Quiz Practice
Active Recall Drill Session
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Question 1 of 1
medium
System Design
Why does virtualizing a long list matter for a live comments feature specifically?
A
It has no real benefit for comment lists
B
A long-running live event can accumulate thousands of comments, and rendering a DOM node for every single one becomes the actual performance bottleneck — virtualization bounds rendered DOM nodes to what's currently visible
C
It only matters for images, not text content
D
It's required by all component frameworks regardless of list length
Check Answer