Increased app startup time after updating to FirebaseSDK 10.24

[orbitekk]

Description

After upgrading to FirebaseSDK 10.24, we noticed a significant decrease in the start-up time of our apps. Subsequent versions of the SDK did not result in an improvement. At the time, no changes were made to the code that would affect performance. The two apps are completely different - they do not share code.

I have highlighted the FirebseSDK versions in the graphs.

App 1:

App 2:

Reproducing the issue

Upgrade to FirebaseSDK 10.24 or later

Firebase SDK Version

10.24

Xcode Version

15.4

Installation Method

CocoaPods

Firebase Product(s)

Analytics, Crashlytics, Messaging, Performance, Remote Config

Targeted Platforms

iOS

Relevant Log Output

No response

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If using CocoaPods, the project's Podfile.lock

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[orbitekk]

I am also attaching a screen shot from the Firebase Performance console regarding App 1

[rizafran]

Thanks for reporting, @orbitekk. Is it possible for you to try isolating the increase of startup time to specific Firebase pods and profile your app using Instruments?

[mkj-is]

@orbitekk We noticed there is a lot of Launch reports in Xcode 16 Organizer related to Firebase initialization. I recommend you check it. Shared our findings in #13232.

[orbitekk]

@rizafran After many hours of debugging, the cause was identified. The problem lay in another SDK which was also updated at the same time. Therefore, the ticket can be closed as it does not directly relate to FirebseSDK.