# Runtime excerpts

Times are main-process monotonic milliseconds; every source line also has UTC. Native completion is below every scheduling gate. B is Electron isBeingCaptured(), not a named macOS assertion.

## C — before

```text
626050.342 event="row_begin" level="instrumented real-app: service snapshot, ungated"
627081.026 event="P+"
627081.418 event="native_send" n=73 method="Page.captureScreenshot" format="png" pending=1
627150.609 event="native_resolve" n=73 method="Page.captureScreenshot" bytes=52952 pending=0
627150.772 event="P-"
627188.148 event="P+"
627189.068 event="native_send" n=85 method="Page.captureScreenshot" format="png" pending=1
627273.618 event="native_resolve" n=85 method="Page.captureScreenshot" bytes=52952 pending=0
627273.771 event="P-"
637060.388 event="native_send" n=88 method="Emulation.setFocusEmulationEnabled" F=false pending=0
637062.023 event="native_resolve" n=88 method="Emulation.setFocusEmulationEnabled" F=false pending=0
637062.090 event="B" why="native_resolve" B=false pending=0
637079.484 event="window_hide" visible=false
637084.166 event="B" why="native_resolve" B=true pending=0
637106.323 event="P+"
637106.781 event="native_send" n=99 method="Page.captureScreenshot" format="png" pending=1
637412.503 event="window_restore"
637497.581 event="native_resolve" n=99 method="Page.captureScreenshot" bytes=52952 pending=0
637497.730 event="P-"
647084.256 event="native_send" n=102 method="Emulation.setFocusEmulationEnabled" F=false pending=0
647085.334 event="native_resolve" n=102 method="Emulation.setFocusEmulationEnabled" F=false pending=0
647119.433 event="row_end"
```

## T — before

```text
1714773.932 event="row_begin" level="gated real-app; actual Cursor auto run, wait provider activity, authenticated run.interrupt"
1718345.917 event="host_received" type="turn" active=true
1730419.052 event="window_hide" visible=false
1730427.130 event="P+"
1730427.866 event="native_send" n=20 method="Page.captureScreenshot" format="png" pending=1
1730873.845 event="host_received" type="turn" active=false
1730873.960 event="P-"
1735427.356 event="native_send" n=21 method="Emulation.setFocusEmulationEnabled" F=false pending=1
1735428.498 event="native_resolve" n=21 method="Emulation.setFocusEmulationEnabled" F=false pending=1
1735428.622 event="B" why="native_resolve" B=true pending=1
1735724.272 event="B" why="interval" B=true pending=1
1736041.533 event="window_restore"
1738045.751 event="bounded_stall_end" seconds_after_restore=2
1738047.342 event="rescue_begin" method="scratch CSS move hidden wrapper to (0,0), then restore idle style"
1738148.149 event="native_resolve" n=20 method="Page.captureScreenshot" bytes=52952 pending=0
1738181.346 event="rescue_end"
1738267.360 event="row_end"
```

## R1 — before

```text
807851.467 event="row_begin" level="gated real-app: scratch ServerBrowser.dropTab(closeSession=false)"
807856.390 event="window_hide" visible=false
807884.770 event="P+"
807885.342 event="native_send" n=47 method="Page.captureScreenshot" format="png" pending=1
808357.605 event="host_received" type="release"
808357.709 event="P-"
817544.810 event="native_send" n=50 method="Emulation.setFocusEmulationEnabled" F=false pending=1
817545.846 event="native_resolve" n=50 method="Emulation.setFocusEmulationEnabled" F=false pending=1
817545.942 event="B" why="native_resolve" B=true pending=1
817819.569 event="B" why="interval" B=true pending=1
818164.351 event="window_restore"
820168.210 event="bounded_stall_end" seconds_after_restore=2
820169.195 event="rescue_begin" method="scratch CSS move hidden wrapper to (0,0), then restore idle style"
820243.027 event="native_resolve" n=47 method="Page.captureScreenshot" bytes=52952 pending=0
820261.053 event="rescue_end"
820351.966 event="row_end"
```

## R2 — before

```text
1020649.382 event="row_begin" level="instrumented real-app: actual backend restart; frontend reconnect held; synthetic tab snapshot restored after native completion"
1020657.110 event="window_hide" visible=false
1020660.517 event="P+"
1020661.204 event="native_send" n=171 method="Page.captureScreenshot" format="png" pending=1
1020699.460 event="backend_restart_requested" pid=94193
1021515.765 event="backend_started" pid=94719
1021516.429 event="announceAll"
1021516.552 event="P-"
1025661.877 event="native_send" n=172 method="Emulation.setFocusEmulationEnabled" F=false pending=1
1025663.046 event="native_resolve" n=172 method="Emulation.setFocusEmulationEnabled" F=false pending=1
1025663.115 event="B" why="native_resolve" B=true pending=1
1025700.486 event="B" why="interval" B=true pending=1
1026281.403 event="window_restore"
1028286.096 event="bounded_stall_end"
1028287.972 event="rescue_begin" method="scratch CSS move hidden wrapper to (0,0), then restore idle style"
1028376.255 event="native_resolve" n=171 method="Page.captureScreenshot" bytes=27592 pending=0
1028421.551 event="rescue_end"
1028748.257 event="guest_survived" sameWebContents=true
1029032.758 event="synthetic_tab_snapshot_restored" reason="backend preview registry is in-memory; frontend reconnect held to preserve existing guest"
1029034.414 event="P+"
1029034.859 event="native_send" n=188 method="Page.captureScreenshot" format="png" pending=1
1029387.469 event="native_resolve" n=188 method="Page.captureScreenshot" bytes=27592 pending=0
1029387.655 event="P-"
1029391.301 event="new_backend_snapshot" bytes=20694 width=1280 height=800
1038378.203 event="native_send" n=189 method="Emulation.setFocusEmulationEnabled" F=false pending=0
1038379.434 event="native_resolve" n=189 method="Emulation.setFocusEmulationEnabled" F=false pending=0
1038381.231 event="row_end"
```

## D — before

```text
820388.382 event="row_begin" level="gated real-app: read-only viewer, natural settled JPEG, close owning socket"
820415.622 event="P+"
820425.319 event="native_send" n=71 method="Page.captureScreenshot" format="jpeg" pending=1
820480.922 event="native_resolve" n=71 method="Page.captureScreenshot" bytes=32828 pending=0
820678.507 event="native_send" n=77 method="Page.captureScreenshot" format="jpeg" pending=1
820714.257 event="native_resolve" n=77 method="Page.captureScreenshot" bytes=32828 pending=0
820902.992 event="native_send" n=81 method="Page.captureScreenshot" format="jpeg" pending=1
820934.284 event="native_resolve" n=81 method="Page.captureScreenshot" bytes=32828 pending=0
821130.326 event="native_send" n=85 method="Page.captureScreenshot" format="jpeg" pending=1
821163.039 event="native_resolve" n=85 method="Page.captureScreenshot" bytes=25900 pending=0
821453.402 event="window_hide" visible=false
821675.579 event="native_send" n=124 method="Page.captureScreenshot" format="jpeg" pending=1
821848.348 event="host_received" type="cdp" id=64 method="Target.detachFromTarget" sessionId="t3-preview-browser-1" detach="t3-preview-page-3"
821848.530 event="P-"
830243.519 event="native_send" n=126 method="Emulation.setFocusEmulationEnabled" F=false pending=1
830245.072 event="native_resolve" n=126 method="Emulation.setFocusEmulationEnabled" F=false pending=1
830245.251 event="B" why="native_resolve" B=true pending=1
830332.211 event="B" why="interval" B=true pending=1
830863.901 event="window_restore"
832868.081 event="bounded_stall_end"
832869.116 event="rescue_begin" method="scratch CSS move hidden wrapper to (0,0), then restore idle style"
832921.670 event="native_resolve" n=124 method="Page.captureScreenshot" bytes=12640 pending=0
832963.307 event="rescue_end"
833347.741 event="row_end"
```

## C — after

```text
278547.247 event="row_begin" level="instrumented real-app: service snapshot, ungated"
279581.131 event="P+"
279581.561 event="native_send" n=73 method="Page.captureScreenshot" format="png" pending=1
279716.891 event="native_resolve" n=73 method="Page.captureScreenshot" bytes=52952 pending=0
279717.149 event="P-"
279752.047 event="P+"
279752.421 event="native_send" n=85 method="Page.captureScreenshot" format="png" pending=1
279830.029 event="native_resolve" n=85 method="Page.captureScreenshot" bytes=52952 pending=0
279830.164 event="P-"
289558.514 event="native_send" n=88 method="Emulation.setFocusEmulationEnabled" F=false pending=0
289559.531 event="native_resolve" n=88 method="Emulation.setFocusEmulationEnabled" F=false pending=0
289559.610 event="B" why="native_resolve" B=false pending=0
289569.939 event="window_hide" visible=false
289574.632 event="B" why="native_resolve" B=true pending=0
289596.826 event="P+"
289597.233 event="native_send" n=99 method="Page.captureScreenshot" format="png" pending=1
290023.960 event="window_restore"
290586.601 event="native_resolve" n=99 method="Page.captureScreenshot" bytes=52952 pending=0
290586.781 event="P-"
299574.521 event="native_send" n=102 method="Emulation.setFocusEmulationEnabled" F=false pending=0
299575.562 event="native_resolve" n=102 method="Emulation.setFocusEmulationEnabled" F=false pending=0
299607.949 event="row_end"
```

## T — after

```text
1367299.309 event="row_begin" level="gated real-app; actual Cursor auto run, wait provider activity, authenticated run.interrupt"
1369932.305 event="host_received" type="turn" active=true
1382003.433 event="window_hide" visible=false
1382009.382 event="P+"
1382009.839 event="native_send" n=20 method="Page.captureScreenshot" format="png" pending=1
1382444.312 event="host_received" type="turn" active=false
1387009.776 event="native_send" n=21 method="Emulation.setFocusEmulationEnabled" F=false pending=1
1387010.786 event="native_resolve" n=21 method="Emulation.setFocusEmulationEnabled" F=false pending=1
1387010.866 event="B" why="native_resolve" B=true pending=1
1387279.556 event="B" why="interval" B=true pending=1
1387619.255 event="window_restore"
1387758.574 event="native_resolve" n=20 method="Page.captureScreenshot" bytes=52952 pending=0
1387758.768 event="P-"
1387788.485 event="row_end"
```

## R1 — after

```text
458412.064 event="row_begin" level="gated real-app: scratch ServerBrowser.dropTab(closeSession=false)"
458416.682 event="window_hide" visible=false
458449.113 event="P+"
458449.551 event="native_send" n=47 method="Page.captureScreenshot" format="png" pending=1
458916.734 event="host_received" type="release"
468093.250 event="native_send" n=50 method="Emulation.setFocusEmulationEnabled" F=false pending=1
468094.045 event="native_resolve" n=50 method="Emulation.setFocusEmulationEnabled" F=false pending=1
468094.125 event="B" why="native_resolve" B=true pending=1
468384.039 event="B" why="interval" B=true pending=1
468715.962 event="window_restore"
468807.714 event="native_resolve" n=47 method="Page.captureScreenshot" bytes=52952 pending=0
468807.876 event="P-"
468927.153 event="row_end"
```

## R2 — after

```text
673131.381 event="row_begin" level="instrumented real-app: actual backend restart; frontend reconnect held; synthetic tab snapshot restored after native completion"
673141.036 event="window_hide" visible=false
673149.938 event="P+"
673150.309 event="native_send" n=168 method="Page.captureScreenshot" format="png" pending=1
673271.388 event="backend_restart_requested" pid=94207
674135.326 event="backend_started" pid=94755
674137.524 event="announceAll"
678149.914 event="native_send" n=169 method="Emulation.setFocusEmulationEnabled" F=false pending=1
678151.626 event="native_resolve" n=169 method="Emulation.setFocusEmulationEnabled" F=false pending=1
678151.747 event="B" why="native_resolve" B=true pending=1
678270.765 event="B" why="interval" B=true pending=1
678780.457 event="window_restore"
678883.797 event="native_resolve" n=168 method="Page.captureScreenshot" bytes=27592 pending=0
678883.943 event="P-"
679275.135 event="guest_survived" sameWebContents=true
679580.896 event="synthetic_tab_snapshot_restored" reason="backend preview registry is in-memory; frontend reconnect held to preserve existing guest"
679582.786 event="P+"
679583.231 event="native_send" n=185 method="Page.captureScreenshot" format="png" pending=1
679689.544 event="native_resolve" n=185 method="Page.captureScreenshot" bytes=27592 pending=0
679689.685 event="P-"
679698.562 event="new_backend_snapshot" bytes=20694 width=1280 height=800
688885.990 event="native_send" n=186 method="Emulation.setFocusEmulationEnabled" F=false pending=0
688888.671 event="native_resolve" n=186 method="Emulation.setFocusEmulationEnabled" F=false pending=0
688931.865 event="row_end"
```

## D — after

```text
468963.528 event="row_begin" level="gated real-app: read-only viewer, natural settled JPEG, close owning socket"
469012.301 event="P+"
469017.746 event="native_send" n=71 method="Page.captureScreenshot" format="jpeg" pending=1
469093.732 event="native_resolve" n=71 method="Page.captureScreenshot" bytes=32828 pending=0
469277.584 event="native_send" n=80 method="Page.captureScreenshot" format="jpeg" pending=1
469310.074 event="native_resolve" n=80 method="Page.captureScreenshot" bytes=32828 pending=0
469501.726 event="native_send" n=84 method="Page.captureScreenshot" format="jpeg" pending=1
469530.980 event="native_resolve" n=84 method="Page.captureScreenshot" bytes=32828 pending=0
469726.030 event="native_send" n=88 method="Page.captureScreenshot" format="jpeg" pending=1
469776.437 event="native_resolve" n=88 method="Page.captureScreenshot" bytes=25900 pending=0
470066.910 event="window_hide" visible=false
470227.487 event="native_send" n=121 method="Page.captureScreenshot" format="jpeg" pending=1
470415.306 event="host_received" type="cdp" id=62 method="Target.detachFromTarget" sessionId="t3-preview-browser-1" detach="t3-preview-page-3"
478808.069 event="native_send" n=123 method="Emulation.setFocusEmulationEnabled" F=false pending=1
478809.401 event="native_resolve" n=123 method="Emulation.setFocusEmulationEnabled" F=false pending=1
478809.544 event="B" why="native_resolve" B=true pending=1
478891.678 event="B" why="interval" B=true pending=1
479445.468 event="window_restore"
479526.402 event="native_resolve" n=121 method="Page.captureScreenshot" bytes=12640 pending=0
479526.542 event="P-"
479538.228 event="row_end"
```