# Compose phone bench v3, 2026-09-09

Fresh release run on Iris's Pixel 9 Pro XL, kept as the Compose comparison
for `iris-phone-v3-2026-09-09.md`. The report says **60 Hz** and therefore
judges `late` against a 16.7 ms budget, but Iris observed what looked like
120 Hz. The fling count supports that observation: after subtracting the
sixteen deliberate 300 ms rests, 3,279 frames over 27.9 seconds is about
118 fps. Android's adaptive-refresh query has previously returned 60 Hz
during a run that actually sustained 120 Hz; unlike the corrected iris
reporter, this Compose reporter does not resolve the platform answer against
the measured cadence. Treat the physical display rate as likely 120 Hz but
the printed `late` figures as calculated at 60 Hz, and compare millisecond
percentiles rather than the two apps' `late` percentages.

This reproduces the 2026-09-06 Compose v2 result closely. Streaming remains
the long tail: 43.3% late, p50 13.8 ms and p99 42.6 ms. The counters below
attribute it primarily to reparsing markdown while streaming (8.6 ms mean)
and recording the changed block (6.3 ms mean). Fling, typing and keyboard
remain clean at the reporter's 60 Hz budget.

```text
ai-app render report
device: Pixel 9 Pro XL (Google), Android 17
build: release

transcript:
  108 events, 26 rows, 58 units loaded
  viewport 1531px, 2 units visible
  on screen: the list's own 0px, AssistantMsg 24520px
  0 tool calls and 0 groups open

per phase:
  fling: 3279 frames over 32.7s
    late: 4 (0.1%)
      total  p50 5.5ms  p90 7.1ms  p99 11.4ms
    worst 30.9ms
  stream: 1041 frames over 21.6s
    late: 451 (43.3%)
      total  p50 13.8ms  p90 32.1ms  p99 42.6ms
    worst 58.5ms
  type: 2444 frames over 61.5s
    late: 29 (1.2%)
      total  p50 7.2ms  p90 13.4ms  p99 16.8ms
    worst 32.9ms
  keyboard: 359 frames over 10.1s
    late: 1 (0.3%)
      total  p50 6.2ms  p90 7.7ms  p99 10.5ms
    worst 16.7ms

frames:
  7122 frames over 125.8s at 60Hz (16.7ms budget)
  late: 485 (6.8%)
  total  p50 6.0ms  p90 13.9ms  p99 34.0ms
  waited p50 0.5ms  p90 1.2ms  p99 20.9ms
  input  p50 0.0ms  p90 0.0ms  p99 0.0ms
  anim   p50 0.7ms  p90 4.6ms  p99 7.8ms
  layout p50 0.1ms  p90 0.1ms  p99 0.2ms
  draw   p50 0.7ms  p90 2.9ms  p99 22.6ms
  sync   p50 0.1ms  p90 0.2ms  p99 0.6ms
  issue  p50 1.4ms  p90 2.4ms  p99 3.2ms
  swap   p50 0.4ms  p90 0.8ms  p99 1.2ms
  gpu    p50 1.5ms  p90 2.1ms  p99 6.6ms

where the draw phase went:
  draw phase 1.74ms per frame, of which:
    the transcript: 0.24ms (measure 0.10, place 0.14, record 0.00)
    everything else: 1.49ms (85%)

work since this was last copied:
  draw: the whole transcript: 280, 1.9ms total, 0.0ms mean, 0.0ms worst
  grouped tool runs: 407, 18.4ms total, 0.0ms mean, 0.2ms worst
  markdown cut into pieces: 40, 0.4ms total, 0.0ms mean, 0.0ms worst
  markdown parsed while composing: 2, 1.6ms total, 0.8ms mean, 1.1ms worst
  markdown ready: 323
  markdown reparsed while streaming: 395, 3417.3ms total, 8.6ms mean, 29.3ms worst
  markdown warmed: 40, 39.3ms total, 1.0ms mean, 4.2ms worst
  measure: the whole transcript: 1977, 683.5ms total, 0.3ms mean, 13.7ms worst
  message composed: 397
  message cut into parts: 40, 3.0ms total, 0.1ms mean, 0.2ms worst
  place: the whole transcript: 4306, 1003.1ms total, 0.2ms mean, 4.2ms worst
  record: one block: 394, 2473.7ms total, 6.3ms mean, 25.1ms worst
  session screen recomposed: 1631
  status row recomposed: 1
  transcript page from server: 10
  unit composed: 927
  units flattened: 408, 85.9ms total, 0.2ms mean, 2.0ms worst

bench:
  fling: 8 flings out + 8 back at 12000px/s, travel start=idx=0/off=0px outward=idx=188/off=182px end=idx=0/off=0px
  scroll: 6 cycles (24 swipes, legacy tween), streamed 400/400 fixture events
  type: 600 characters inserted then deleted, one per 50ms
  keyboard: shown 5/5, hidden 5/5 (confirmed via isImeVisible)
  process CPU time over this run: 70502ms
  peak RSS: 581084kB
  battery current: mean -591350µA over 126 samples (min -2271093, max -99218)
```