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ci(ios): boot the Detox simulator before the build so its first boot doesn't starve the tests #4444

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Merged
mfazekas merged 3 commits into from
Nov 9, 2026
Merged

ci(ios): boot the Detox simulator before the build so its first boot doesn't starve the tests #4444

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61178aa
ci(ios): wait for the freshly booted simulator to settle before Detox…
mfazekas Nov 8, 2026
c33b121
ci(ios): boot the Detox simulator before the build, cap the settle wa…
mfazekas Nov 8, 2026
2b8e261
ci(ios): drop the post-build settle wait, log one load snapshot instead
mfazekas Nov 8, 2026
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16 changes: 11 additions & 5 deletions .github/workflows/ios-actions.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -67,6 +67,14 @@ jobs:
- name: Checkout
uses: actions/checkout@v4

# A new simulator renders posters and widgets for over 10 minutes after its first boot, starving
# the app under test, so boot the one Detox uses now and let that overlap with the build
- name: Boot simulator
run: |
UDID=$("$GITHUB_WORKSPACE/scripts/ci/pick-ios-simulator.sh")
echo "DETOX_DEVICE_UDID=$UDID" >> "$GITHUB_ENV"
xcrun simctl boot "$UDID"

# Fork PRs get no secrets; fall back to the public rotated CI token (see rnmapbox/ci-config)
- name: Access Token
run: |
Expand Down Expand Up @@ -145,12 +153,10 @@ jobs:
xcodebuild -version
set -o pipefail && NSUnbufferedIO=YES yarn detox build --configuration "$DETOX_CONFIGURATION" 2>&1

- name: Boot simulator
- name: Wait for the simulator
run: |
UDID=$("$GITHUB_WORKSPACE/scripts/ci/pick-ios-simulator.sh")
echo "DETOX_DEVICE_UDID=$UDID" >> "$GITHUB_ENV"
xcrun simctl boot "$UDID"
time xcrun simctl bootstatus "$UDID"
time xcrun simctl bootstatus "$DETOX_DEVICE_UDID"
echo "load: $(sysctl -n vm.loadavg), free: $(vm_stat | awk '/Pages free/ {print int($3 * 16384 / 1048576)}') MB"

- name: Test with detox
if: inputs.E2E_MODE == 'test'
Expand Down
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