thepraandClaude Opus 5.5
a5178a67b1
A Perf test (tests/e2e/Perf/FeedPerfTests, Category=Perf) scrolls load0's home, thousands of posts from SocialPub's load runs, to 2000 posts. Before: 100 cards took 12 s to reach, 1000 took 437 s, 2000 took 29 minutes; the main thread was busy almost all of that time, and the page held 224 000 DOM nodes and 920 MB of .NET heap. Every card re-rendered whenever the list did. - A card re-renders only when its own events run or its render key changes (Content.RenderKey: the post, its status, notification, conversation, place and grouping, where it is shown, the persona and the connection). 2000 cards then took 122 s. - The list is a <Virtualize>: only the cards near the view are rendered. The page now holds about 3 000 DOM nodes and 145 MB however long the feed is, and each page of older posts costs the same (about 1.9 s in the test's scroll loop) at the 100th post as at the 1700th. The feed tells how many posts it holds in data-feed-count. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01LsXgEaXee4GCU1hwYgPJXw