diff --git a/bench/results/2026-09-28-9e4dcdd-final.json b/bench/results/2026-09-28-9e4dcdd-final.json
new file mode 100644
index 0000000..f0f657f
--- /dev/null
+++ b/bench/results/2026-09-28-9e4dcdd-final.json
@@ -0,0 +1,1173 @@
+{
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+     "p50": 0.0,
+     "p95": 0.0,
+     "p99": 0.1,
+     "n": 96
+    },
+    "encode": {
+     "p50": 6.9,
+     "p95": 10.7,
+     "p99": 15.1,
+     "n": 96
+    },
+    "socket": {
+     "p50": 0.1,
+     "p95": 0.2,
+     "p99": 0.2,
+     "n": 96
+    },
+    "network": {
+     "p50": 4.1,
+     "p95": 6.3,
+     "p99": 8.5,
+     "n": 96
+    },
+    "decode": {
+     "p50": 2.2,
+     "p95": 5.0,
+     "p99": 6.3,
+     "n": 96
+    },
+    "draw": {
+     "p50": 0.8,
+     "p95": 1.4,
+     "p99": 1.9,
+     "n": 96
+    },
+    "present": {
+     "p50": 0.6,
+     "p95": 1.2,
+     "p99": 4.5,
+     "n": 96
+    },
+    "content": {
+     "p50": 15.0,
+     "p95": 21.4,
+     "p99": 30.7,
+     "n": 96
+    },
+    "content_shown": {
+     "p50": 15.8,
+     "p95": 22.2,
+     "p99": 33.0,
+     "n": 96
+    }
+   },
+   "fps": 4.6,
+   "fps_shown": 4.6,
+   "late_pct": 82.47,
+   "stall_max": 1002.0,
+   "stalls_over_100ms": 74,
+   "mbps": 0.01,
+   "keyframes": 0,
+   "size": "1920x1290",
+   "captured": 96,
+   "viewer_never_drawn": 0,
+   "input_ms": {
+    "p50": 43.0,
+    "p95": 60.5,
+    "p99": 80.0,
+    "n": 66
+   },
+   "input_shown_ms": {
+    "p50": 43.8,
+    "p95": 61.5,
+    "p99": 80.7,
+    "n": 66
+   },
+   "input_parts_ms": {
+    "uplink": {
+     "p50": 4.3,
+     "p95": 6.9,
+     "p99": 32.6,
+     "n": 66
+    },
+    "mac": {
+     "p50": 23.5,
+     "p95": 34.8,
+     "p99": 39.6,
+     "n": 66
+    },
+    "back": {
+     "p50": 15.0,
+     "p95": 20.7,
+     "p99": 21.9,
+     "n": 66
+    }
+   },
+   "inputs": {
+    "asked": 65,
+    "sent": 66,
+    "seen": 66
+   },
+   "timeline": [
+    {
+     "t": 0,
+     "fps": 17,
+     "mbps": 0.04,
+     "content_p50": 13.7,
+     "content_p95": 19.4,
+     "bitrate": 14860800,
+     "tier": 0,
+     "w": 1920,
+     "net": null
+    },
+    {
+     "t": 1,
+     "fps": 9,
+     "mbps": 0.04,
+     "content_p50": 15.5,
+     "content_p95": 41.3,
+     "bitrate": 14860800,
+     "tier": 0,
+     "w": 1920,
+     "net": null
+    },
+    {
+     "t": 2,
+     "fps": 7,
+     "mbps": 0.02,
+     "content_p50": 14.3,
+     "content_p95": 18.9,
+     "bitrate": 14860800,
+     "tier": 0,
+     "w": 1920,
+     "net": null
+    },
+    {
+     "t": 3,
+     "fps": 5,
+     "mbps": 0.02,
+     "content_p50": 16.3,
+     "content_p95": 21.4,
+     "bitrate": 14860800,
+     "tier": 0,
+     "w": 1920,
+     "net": null
+    },
+    {
+     "t": 4,
+     "fps": 5,
+     "mbps": 0.02,
+     "content_p50": 14.4,
+     "content_p95": 16.0,
+     "bitrate": 14860800,
+     "tier": 0,
+     "w": 1920,
+     "net": null
+    },
+    {
+     "t": 5,
+     "fps": 5,
+     "mbps": 0.02,
+     "content_p50": 13.7,
+     "content_p95": 20.3,
+     "bitrate": 14860800,
+     "tier": 0,
+     "w": 1920,
+     "net": null
+    },
+    {
+     "t": 6,
+     "fps": 5,
+     "mbps": 0.02,
+     "content_p50": 17.8,
+     "content_p95": 20.0,
+     "bitrate": 14860800,
+     "tier": 0,
+     "w": 1920,
+     "net": null
+    },
+    {
+     "t": 7,
+     "fps": 5,
+     "mbps": 0.02,
+     "content_p50": 15.5,
+     "content_p95": 17.6,
+     "bitrate": 14860800,
+     "tier": 0,
+     "w": 1920,
+     "net": null
+    },
+    {
+     "t": 8,
+     "fps": 5,
+     "mbps": 0.02,
+     "content_p50": 14.6,
+     "content_p95": 16.7,
+     "bitrate": 14860800,
+     "tier": 0,
+     "w": 1920,
+     "net": null
+    },
+    {
+     "t": 9,
+     "fps": 5,
+     "mbps": 0.02,
+     "content_p50": 16.5,
+     "content_p95": 29.6,
+     "bitrate": 14860800,
+     "tier": 0,
+     "w": 1920,
+     "net": null
+    },
+    {
+     "t": 10,
+     "fps": 5,
+     "mbps": 0.02,
+     "content_p50": 14.8,
+     "content_p95": 18.1,
+     "bitrate": 14860800,
+     "tier": 0,
+     "w": 1920,
+     "net": null
+    },
+    {
+     "t": 11,
+     "fps": 5,
+     "mbps": 0.02,
+     "content_p50": 16.7,
+     "content_p95": 18.9,
+     "bitrate": 14860800,
+     "tier": 0,
+     "w": 1920,
+     "net": null
+    },
+    {
+     "t": 12,
+     "fps": 2,
+     "mbps": 0.01,
+     "content_p50": 13.6,
+     "content_p95": 19.6,
+     "bitrate": 14860800,
+     "tier": 0,
+     "w": 1920,
+     "net": null
+    },
+    {
+     "t": 13,
+     "fps": 1,
+     "mbps": 0.0,
+     "content_p50": 17.8,
+     "content_p95": 17.8,
+     "bitrate": 14860800,
+     "tier": 0,
+     "w": 1920,
+     "net": null
+    },
+    {
+     "t": 14,
+     "fps": 2,
+     "mbps": 0.01,
+     "content_p50": 19.8,
+     "content_p95": 20.4,
+     "bitrate": 14860800,
+     "tier": 0,
+     "w": 1920,
+     "net": null
+    },
+    {
+     "t": 15,
+     "fps": 1,
+     "mbps": 0.0,
+     "content_p50": 15.7,
+     "content_p95": 15.7,
+     "bitrate": 14860800,
+     "tier": 0,
+     "w": 1920,
+     "net": null
+    },
+    {
+     "t": 16,
+     "fps": 4,
+     "mbps": 0.01,
+     "content_p50": 13.6,
+     "content_p95": 19.9,
+     "bitrate": 14860800,
+     "tier": 0,
+     "w": 1920,
+     "net": null
+    },
+    {
+     "t": 17,
+     "fps": 3,
+     "mbps": 0.01,
+     "content_p50": 15.3,
+     "content_p95": 30.7,
+     "bitrate": 14860800,
+     "tier": 0,
+     "w": 1920,
+     "net": null
+    },
+    {
+     "t": 18,
+     "fps": 2,
+     "mbps": 0.01,
+     "content_p50": 17.4,
+     "content_p95": 19.3,
+     "bitrate": 14860800,
+     "tier": 0,
+     "w": 1920,
+     "net": null
+    },
+    {
+     "t": 19,
+     "fps": 2,
+     "mbps": 0.0,
+     "content_p50": 11.6,
+     "content_p95": 15.2,
+     "bitrate": 14860800,
+     "tier": 0,
+     "w": 1920,
+     "net": null
+    },
+    {
+     "t": 20,
+     "fps": 1,
+     "mbps": 0.0,
+     "content_p50": 14.8,
+     "content_p95": 14.8,
+     "bitrate": 14860800,
+     "tier": 0,
+     "w": 1920,
+     "net": null
+    }
+   ],
+   "adapt": [],
+   "content_p50": 15.0,
+   "content_p95": 21.4,
+   "input_p50": 43.0,
+   "input_p95": 60.5,
+   "grades": {
+    "input_replies": "local",
+    "content_p50": "local",
+    "content_p95": "local",
+    "input_p50": "local",
+    "input_p95": "local"
+   },
+   "controller": {
+    "adapt": true,
+    "baseRtt": 5.75,
+    "ceiling": 14860800,
+    "fps": 60,
+    "inFlight": 0,
+    "scale": 1,
+    "slack": 41.666,
+    "target": 14860800,
+    "tier": 0
+   },
+   "events": [],
+   "source_fps": 4.5,
+   "cpu": {
+    "mac_agent_pct": 1.4,
+    "frame_viewer_pct": 5.3,
+    "frame_tailscaled_pct": 1.5,
+    "frame_sshd_pct": 0.1,
+    "frame_gamescope_pct": 5.9,
+    "frame_total_pct": 28.4
+   },
+   "viewer": "h264 software; ANGLE (Mesa, zink Vulkan 1.4(Turnip Adreno (TM) 750 (MESA_TURNIP)), OpenGL 4.6); raf 139 Hz",
+   "show_s": 1.3,
+   "panel": "valve.steam.desktopgame.2001175832",
+   "src": "separate:7747"
+  }
+ ]
+}
\ No newline at end of file
diff --git a/docs/mac-in-headset.md b/docs/mac-in-headset.md
index 142c9e3..a92da79 100644
--- a/docs/mac-in-headset.md
+++ b/docs/mac-in-headset.md
@@ -196,6 +196,21 @@ Baseline on 2026-09-28 (**verified**, home Wi-Fi, Tailscale, Balanced,
 | scroll (1920×1290) | 14.7 | – | 50.4 | encode 6.7, decode 6.4 (software), 9.4 Mbit/s, 16% late |
 | type (1920×1290) | 16.7 | 51.2 / 73.2 | – | most of the input time is the Mac app reacting |
 
+After this work, with the controller on (**verified**, same setup,
+`bench/results/2026-09-28-9e4dcdd-final.json`; ms p50/p95). Content is
+now measured from the earlier of display time and delivery, which adds
+about 5 ms to scroll compared with the baseline's way of measuring:
+
+| Scenario | Content | Input to drawn | fps drawn | Grades |
+|---|---|---|---|---|
+| test | 10.5 / 16.7 | 29.6 / 36.3 | 60 | all within target |
+| scroll | 19.8 / 27.4 | – | 55.9 | fps, late frames (4.8%) and worst gap (222 ms) only "acceptable": Wi-Fi stalls and ScreenCaptureKit's 46–53 fps from virtual displays |
+| type | 15.0 / 21.4 | 43.0 / 60.5 | – | all within target |
+
+Of the targets, click to photon is met without the Frame's compositor (the
+headset has to be worn to measure its share), and so is content latency.
+The frame-rate and no-stall targets aren't yet met while scrolling.
+
 What was learned (all **verified**, unless marked):
 
 - The biggest costs are encoding (4–7 ms), network (4–6 ms), and decoding
diff --git a/scripts/macview-bench.py b/scripts/macview-bench.py
index 4f65307..36045da 100755
--- a/scripts/macview-bench.py
+++ b/scripts/macview-bench.py
@@ -153,12 +153,30 @@ class Relay:
             w.close()
 
     async def _plain(self, reader, writer):  # Frame -> agent: delay only
+        if not self.delay:
+            while data := await reader.read(65536):
+                writer.write(data)
+                await writer.drain()
+            writer.close()
+            return
+        # Each chunk leaves `delay` after it arrived, while reading goes on:
+        # a delay line, not a pause (which would add up behind a busy stream).
+        queue = asyncio.Queue()
+
+        async def send():
+            while (item := await queue.get())[1] is not None:
+                wait = item[0] - self.loop.time()
+                if wait > 0:
+                    await asyncio.sleep(wait)
+                writer.write(item[1])
+                await writer.drain()
+            writer.close()
+
+        sender = asyncio.ensure_future(send())
         while data := await reader.read(65536):
-            if self.delay:
-                await asyncio.sleep(self.delay)
-            writer.write(data)
-            await writer.drain()
-        writer.close()
+            await queue.put((self.loop.time() + self.delay, data))
+        await queue.put((0, None))
+        await sender
 
     async def _shaped(self, reader, writer):  # agent -> Frame
         queue = asyncio.Queue()