BoardFragment UI Blocking and Memory leak

[jisungbin]

UI Blocking

1. 위치 조회를 onCreate 에서 바로 호출함
2. 리사이클러뷰 여러개의 이미지 로드를 onCreate 에서 바로 호출함

Memory leak

1. LoginActivity 에서 Activity 를 이용하여 카카오 로그인을 하고, 이후 BoardFragment 로 넘어오면서 앞에서 사용했던 Activity 에 대한 메모리 누수가 발생함

┬───
│ GC Root: Global variable in native code
│
├─ android.os.ResultReceiver$MyResultReceiver instance
│    Leaking: UNKNOWN
│    Retaining 3.5 MB in 4819 objects
│    ↓ ResultReceiver$MyResultReceiver.this$0
│                                      ~~~~~~
├─ com.kakao.sdk.auth.AuthCodeClient$resultReceiver$1 instance
│    Leaking: UNKNOWN
│    Retaining 3.5 MB in 4818 objects
│    Anonymous subclass of android.os.ResultReceiver
│    ↓ AuthCodeClient$resultReceiver$1.$callback
│                                      ~~~~~~~~~
├─ com.kakao.sdk.user.UserApiClient$loginWithKakaoTalk$1 instance
│    Leaking: UNKNOWN
│    Retaining 3.5 MB in 4816 objects
│    Anonymous subclass of kotlin.jvm.internal.Lambda
│    ↓ UserApiClient$loginWithKakaoTalk$1.$callback
│                                         ~~~~~~~~~
├─ team.dahaeng.android.data.user.repository.
│  UserRepositoryImpl$loginWithKakaoTalk$2$1 instance
│    Leaking: UNKNOWN
│    Retaining 3.5 MB in 4814 objects
│    Anonymous subclass of kotlin.jvm.internal.Lambda
│    ↓ UserRepositoryImpl$loginWithKakaoTalk$2$1.$continuation
│                                                ~~~~~~~~~~~~~
├─ kotlinx.coroutines.CancellableContinuationImpl instance
│    Leaking: UNKNOWN
│    Retaining 3.5 MB in 4813 objects
│    ↓ CancellableContinuationImpl.delegate
│                                  ~~~~~~~~
├─ kotlinx.coroutines.internal.DispatchedContinuation instance
│    Leaking: UNKNOWN
│    Retaining 1.3 kB in 30 objects
│    ↓ DispatchedContinuation.continuation
│                             ~~~~~~~~~~~~
├─ team.dahaeng.android.data.user.repository.UserRepositoryImpl$kakaoLogin$1
│  instance
│    Leaking: UNKNOWN
│    Retaining 1.2 kB in 29 objects
│    Anonymous subclass of kotlin.coroutines.jvm.internal.ContinuationImpl
│    ↓ BaseContinuationImpl.completion
│                           ~~~~~~~~~~
├─ team.dahaeng.android.domain.user.usecase.KakaoLoginUseCase$invoke$1 instance
│    Leaking: UNKNOWN
│    Retaining 196 B in 7 objects
│    Anonymous subclass of kotlin.coroutines.jvm.internal.ContinuationImpl
│    ↓ BaseContinuationImpl.completion
│                           ~~~~~~~~~~
├─ team.dahaeng.android.activity.login.LoginViewModel$login$1 instance
│    Leaking: UNKNOWN
│    Retaining 128 B in 4 objects
│    Anonymous subclass of kotlin.coroutines.jvm.internal.ContinuationImpl
│    ↓ BaseContinuationImpl.completion
│                           ~~~~~~~~~~
├─ team.dahaeng.android.activity.login.LoginActivity$onCreate$5$1 instance
│    Leaking: UNKNOWN
│    Retaining 80 B in 2 objects
│    Anonymous subclass of kotlin.coroutines.jvm.internal.SuspendLambda
│    L$0 instance of team.dahaeng.android.activity.login.LoginActivity with
│    mDestroyed = true
│    this$0 instance of team.dahaeng.android.activity.login.LoginActivity with
│    mDestroyed = true
│    ↓ LoginActivity$onCreate$5$1.L$0
│                                 ~~~
╰→ team.dahaeng.android.activity.login.LoginActivity instance
​     Leaking: YES (ObjectWatcher was watching this because team.dahaeng.
​     android.activity.login.LoginActivity received Activity#onDestroy()
​     callback and Activity#mDestroyed is true)
​     Retaining 3.5 MB in 4620 objects
​     key = 779e7682-ff6b-4f19-b880-1d2ccc4cedd3
​     watchDurationMillis = 12380
​     retainedDurationMillis = 7379
​     mApplication instance of team.dahaeng.android.DahaengAndroid
​     mBase instance of androidx.appcompat.view.ContextThemeWrapper

METADATA

Build.VERSION.SDK_INT: 30
Build.MANUFACTURER: samsung
LeakCanary version: 2.8.1
App process name: team.dahaeng.android
Stats: LruCache[maxSize=3000,hits=67267,misses=182401,hitRate=26%]
RandomAccess[bytes=17011669,reads=182401,travel=183879434998,range=52067686,size
=95606486]
Analysis duration: 17379 ms