feat: enablePreWarmedAppStartTracing by default

[philipphofmann]

📜 Description

Set the default value of enablePreWarmedAppStartTracing to true.

Docs PR getsentry/sentry-docs#15295.

💡 Motivation and Context

Fixes GH-3535

💚 How did you test it?

Unit tests.

📝 Checklist

You have to check all boxes before merging:

• I added tests to verify the changes.
• No new PII added or SDK only sends newly added PII if sendDefaultPII is enabled.
• I updated the docs if needed.
• I updated the wizard if needed.
• Review from the native team if needed.
• No breaking change or entry added to the changelog.
• No breaking change for hybrid SDKs or communicated to hybrid SDKs.

[github-actions]

	Messages
📖	Do not forget to update Sentry-docs with your feature once the pull request gets approved.

Generated by 🚫 dangerJS against 4ac4f35

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 86.963%. Comparing base (fe83264) to head (4ac4f35).
⚠️ Report is 2 commits behind head on main.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@              Coverage Diff              @@
##              main     #6508       +/-   ##
=============================================
- Coverage   86.996%   86.963%   -0.034%     
=============================================
  Files          452       452               
  Lines        37691     37678       -13     
  Branches     17488     17478       -10     
=============================================
- Hits         32790     32766       -24     
- Misses        4854      4865       +11     
  Partials        47        47               

Files with missing lines	Coverage Δ
Sources/Sentry/SentryOptions.m	97.202% <100.000%> (ø)
...es/Swift/Helper/SentryEnabledFeaturesBuilder.swift	100.000% <ø> (ø)
Sources/Swift/Helper/SentrySdkInfo.swift	100.000% <100.000%> (ø)

... and 8 files with indirect coverage changes

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[cursor]

Bug: Telemetry Tracking Issue for Default Features

The conditional logic for preWarmedAppStartTracing was removed from both the SDK's features and integrations lists. This prevents the feature from being reported in telemetry, even though it's now enabled by default and can still be explicitly disabled. This creates an inconsistency with how other default-enabled features are tracked.

Sources/Swift/Helper/SentryEnabledFeaturesBuilder.swift#L12-L28

sentry-cocoa/Sources/Swift/Helper/SentryEnabledFeaturesBuilder.swift

Lines 12 to 28 in 4ac4f35

	if options.enableCaptureFailedRequests {
	features.append("captureFailedRequests")
	}
	if options.enableTimeToFullDisplayTracing {
	features.append("timeToFullDisplayTracing")
	}
	if options.swiftAsyncStacktraces {
	features.append("swiftAsyncStacktraces")
	}
	if options.enablePersistingTracesWhenCrashing {
	features.append("persistingTracesWhenCrashing")
	}

Sources/Swift/Helper/SentrySdkInfo.swift#L56-L57

sentry-cocoa/Sources/Swift/Helper/SentrySdkInfo.swift

Lines 56 to 57 in 4ac4f35

	let features = SentryEnabledFeaturesBuilder.getEnabledFeatures(options: options)
	let integrations = SentrySDKInternal.currentHub().trimmedInstalledIntegrationNames()

 

---

[github-actions]

Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	1222.35 ms	1261.90 ms	39.55 ms
Size	23.75 KiB	1.01 MiB	1006.46 KiB

Baseline results on branch: main

Startup times

Revision	Plain	With Sentry	Diff
5c5648e	1234.44 ms	1253.79 ms	19.35 ms
fb48c9a	1232.49 ms	1266.27 ms	33.78 ms
d72784d	1214.31 ms	1241.35 ms	27.04 ms
7af87c1	1229.31 ms	1253.84 ms	24.53 ms
029a804	1219.65 ms	1241.96 ms	22.30 ms
139db8b	1231.50 ms	1258.19 ms	26.69 ms
7f4bf81	1241.73 ms	1270.66 ms	28.93 ms
83bb978	1238.33 ms	1260.04 ms	21.71 ms
42cfd79	1222.13 ms	1244.23 ms	22.10 ms
aac24ac	1225.94 ms	1256.38 ms	30.45 ms

App size

Revision	Plain	With Sentry	Diff
5c5648e	23.75 KiB	879.60 KiB	855.86 KiB
fb48c9a	23.75 KiB	1006.34 KiB	982.59 KiB
d72784d	23.75 KiB	988.01 KiB	964.27 KiB
7af87c1	23.75 KiB	933.34 KiB	909.59 KiB
029a804	23.75 KiB	928.11 KiB	904.36 KiB
139db8b	23.75 KiB	920.64 KiB	896.89 KiB
7f4bf81	23.75 KiB	919.70 KiB	895.95 KiB
83bb978	23.75 KiB	920.64 KiB	896.89 KiB
42cfd79	23.75 KiB	880.20 KiB	856.45 KiB
aac24ac	23.75 KiB	1019.17 KiB	995.42 KiB

[philprime]

LGTM