Make mainViewModel lazy on iOS #70
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This commit changes the initialization of `mainViewModel` in `IOSViewModelOwner.kt` to be lazy. This ensures that the `MainViewModel` is only created when it is first accessed.
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Summary of Changes
Hello @cartland, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!
This pull request introduces a targeted optimization for the iOS application by deferring the instantiation of the MainViewModel. By changing its initialization to lazy, the application will only allocate resources for this ViewModel when it's actually needed, contributing to a more efficient and potentially faster initial load experience.
Highlights
- Initialization Strategy Change: I've updated the
mainViewModelproperty inIOSViewModelOwner.ktto use Kotlin'sby lazydelegate. This changes its initialization from eager (atIOSViewModelOwnercreation) to lazy. - Performance Optimization: This ensures that the
MainViewModelinstance is only created and initialized when it is first accessed, rather than immediately whenIOSViewModelOwneris instantiated. This can lead to improved application startup performance and more efficient resource utilization on iOS.
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Code Review
This pull request changes the mainViewModel initialization to be lazy, which is a good performance optimization as it defers object creation until first use. The implementation using by lazy is idiomatic Kotlin. I've made one suggestion to improve code clarity by removing a redundant type cast. Overall, this is a solid improvement.
| )[MainViewModel::class] | ||
| val mainViewModel: MainViewModel by lazy { | ||
| ViewModelProvider.create( | ||
| owner = this as ViewModelStoreOwner, |
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The explicit cast as ViewModelStoreOwner is redundant here. The IOSViewModelOwner class already implements the ViewModelStoreOwner interface, so this is already of the correct type. Removing the unnecessary cast improves code clarity and conciseness.
| owner = this as ViewModelStoreOwner, | |
| owner = this, |
|
Closing, because of the work in the other PRs |
2 participants
This commit changes the initialization of
mainViewModelinIOSViewModelOwner.ktto be lazy. This ensures that theMainViewModelis only created when it is first accessed.