perf(ui): memoize changes lists and reduce stream rendering

2026-02-28 10:31:32 +00:00
parent 482313f662
commit c51e71c7a2
4 changed files with 141 additions and 100 deletions
--- a/packages/ui/src/styles/messaging/message-block-list.css
+++ b/packages/ui/src/styles/messaging/message-block-list.css
@@ -8,6 +8,12 @@
  display: flex;
  flex-direction: column;
  gap: 0.0625rem;
+
+  /* Reduce render + paint work for offscreen (but mounted) blocks.
+     Keep a conservative intrinsic size to avoid scroll jumps. */
+  content-visibility: auto;
+  contain-intrinsic-size: 1px 400px;
+  contain: layout paint style;
 }

 .virtual-item-wrapper {