hermes-agent/apps
Brooklyn Nicholson 81779fa6a0 perf(desktop): don't backfill the transcript while its thread streams
Switching to a STREAMING session took ~1.4s to settle while an idle
session settled in ~50ms. The autopsy probe named it: the
FIRST_PAINT_BUDGET -> RENDER_BUDGET backfill runs as a transition, an
interrupted transition restarts from scratch, and stream flushes land
every 33-250ms — so the 300-part backfill re-rendered over and over
(measured: 1374ms settle, 30 commits, Primitive.div x2237 for one switch).

Gate the backfill on the thread being idle. The user lands on the live
tail immediately either way; older turns backfill the moment the run
ends, and 'Show earlier' remains the manual path meanwhile.

Measured on the live app (diag-switch-autopsy, real sessions):
  switch to idle session        ~35-55ms settled (unchanged)
  switch to streaming session   1374ms -> backfill deferred; lands at
                                the live tail like any other switch

Adds diag-switch-autopsy.mjs (per-switch settle/commits/top-renders) and
live-drive.mjs (status/fps/drag one-liners against the running app).
2026-07-27 01:14:29 -05:00
..
bootstrap-installer fix(installer): stamp the bootstrap-complete marker from the Rust installer 2026-07-26 16:02:13 -05:00
desktop perf(desktop): don't backfill the transcript while its thread streams 2026-07-27 01:14:29 -05:00
shared feat(billing): carry the payment-method union through to clients (#71542) 2026-07-27 01:49:43 +05:30