Two fixes from the Paging 3 perf audit of the mailbox list (#212, #213):
- Bound the unified-inbox paging window (#212): the only PagingConfig left
maxSize at Int.MAX_VALUE, so pages were never evicted and a deep scroll
accumulated the whole inbox in memory. Set maxSize = MAILBOX_PAGE_SIZE * 5
(200), satisfying maxSize >= pageSize + 2*prefetchDistance (120). Safe with
enablePlaceholders = false (the UI null-guards evicted positions).
- Memoize the per-row relative timestamp (#213): MessageRow formatted it via
DateUtils.getRelativeTimeSpanString un-remembered, allocating a String on
every recomposition. Wrapped in remember(timestampMillis).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
JMR-devandClaude Opus 4.8
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