Making more classes stable for performance reasons.

app/src/main/java/com/vitorpamplona/amethyst/model/AntiSpamFilter.kt

@@ -2,6 +2,7 @@ package com.vitorpamplona.amethyst.model
 
 import android.util.Log
 import android.util.LruCache
+import androidx.compose.runtime.Stable
 import androidx.lifecycle.LiveData
 import com.vitorpamplona.amethyst.OptOutFromFilters
 import com.vitorpamplona.amethyst.service.checkNotInMainThread
@@ -65,6 +66,7 @@ class AntiSpamFilter {
     val liveSpam: AntiSpamLiveData = AntiSpamLiveData(this)
 }
 
+@Stable
 class AntiSpamLiveData(val cache: AntiSpamFilter) : LiveData<AntiSpamState>(AntiSpamState(cache)) {
 
     // Refreshes observers in batches.

app/src/main/java/com/vitorpamplona/amethyst/model/Channel.kt

@@ -33,7 +33,7 @@ class PublicChatChannel(idHex: String) : Channel(idHex) {
     }
 
     override fun profilePicture(): String? {
-        if (info.picture.isNullOrBlank()) info.picture = null
+        if (info.picture.isNullOrBlank()) return null
         return info.picture ?: super.profilePicture()
     }
 

app/src/main/java/com/vitorpamplona/amethyst/model/LocalCache.kt

@@ -1,6 +1,7 @@
 package com.vitorpamplona.amethyst.model
 
 import android.util.Log
+import androidx.compose.runtime.Stable
 import com.vitorpamplona.amethyst.Amethyst
 import com.vitorpamplona.amethyst.service.checkNotInMainThread
 import com.vitorpamplona.amethyst.service.model.*
@@ -1280,6 +1281,7 @@ object LocalCache {
     }
 }
 
+@Stable
 class LocalCacheLiveData {
     private val _newEventBundles = MutableSharedFlow<Set<Note>>()
     val newEventBundles = _newEventBundles.asSharedFlow() // read-only public view

app/src/main/java/com/vitorpamplona/amethyst/model/UrlCachedPreviewer.kt

@@ -1,12 +1,14 @@
 package com.vitorpamplona.amethyst.model
 
 import android.util.LruCache
+import androidx.compose.runtime.Stable
 import com.vitorpamplona.amethyst.service.checkNotInMainThread
 import com.vitorpamplona.amethyst.service.previews.BahaUrlPreview
 import com.vitorpamplona.amethyst.service.previews.IUrlPreviewCallback
 import com.vitorpamplona.amethyst.service.previews.UrlInfoItem
 import com.vitorpamplona.amethyst.ui.components.UrlPreviewState
 
+@Stable
 object UrlCachedPreviewer {
     var cache = LruCache<String, UrlPreviewState>(100)
         private set

app/src/main/java/com/vitorpamplona/amethyst/service/BlurHashImage.kt

@@ -2,6 +2,7 @@ package com.vitorpamplona.amethyst.service
 
 import android.content.Context
 import android.net.Uri
+import androidx.compose.runtime.Stable
 import androidx.core.graphics.drawable.toDrawable
 import coil.ImageLoader
 import coil.decode.DataSource
@@ -14,6 +15,7 @@ import java.net.URLDecoder
 import java.net.URLEncoder
 import kotlin.math.roundToInt
 
+@Stable
 class BlurHashFetcher(
     private val options: Options,
     private val data: Uri

app/src/main/java/com/vitorpamplona/amethyst/service/NIP30Parser.kt

@@ -1,7 +1,9 @@
 package com.vitorpamplona.amethyst.service
 
+import androidx.compose.runtime.Immutable
 import java.util.regex.Pattern
 
+@Immutable
 class NIP30Parser {
     val customEmojiPattern: Pattern = Pattern.compile("\\:([A-Za-z0-9_\\-]+)\\:", Pattern.CASE_INSENSITIVE)
 

app/src/main/java/com/vitorpamplona/amethyst/service/model/ChannelCreateEvent.kt

@@ -46,5 +46,6 @@ class ChannelCreateEvent(
         }
     }
 
-    data class ChannelData(var name: String?, var about: String?, var picture: String?)
+    @Immutable
+    data class ChannelData(val name: String?, val about: String?, val picture: String?)
 }

app/src/main/java/com/vitorpamplona/amethyst/service/model/ContactListEvent.kt

@@ -2,6 +2,7 @@ package com.vitorpamplona.amethyst.service.model
 
 import android.util.Log
 import androidx.compose.runtime.Immutable
+import androidx.compose.runtime.Stable
 import com.google.gson.reflect.TypeToken
 import com.vitorpamplona.amethyst.model.HexKey
 import com.vitorpamplona.amethyst.model.decodePublicKey
@@ -12,6 +13,7 @@ import java.util.Date
 @Immutable
 data class Contact(val pubKeyHex: String, val relayUri: String?)
 
+@Stable
 class ContactListEvent(
     id: HexKey,
     pubKey: HexKey,

app/src/main/java/com/vitorpamplona/amethyst/service/model/MetadataEvent.kt

@@ -1,6 +1,7 @@
 package com.vitorpamplona.amethyst.service.model
 
 import android.util.Log
+import androidx.compose.runtime.Stable
 import com.fasterxml.jackson.databind.DeserializationFeature
 import com.fasterxml.jackson.module.kotlin.jacksonObjectMapper
 import com.google.gson.Gson
@@ -12,9 +13,10 @@ import nostr.postr.Utils
 import java.io.ByteArrayInputStream
 import java.util.Date
 
+@Stable
 abstract class IdentityClaim(
-    var identity: String,
-    var proof: String
+    val identity: String,
+    val proof: String
 ) {
     abstract fun toProofUrl(): String
     abstract fun toIcon(): Int

app/src/main/java/com/vitorpamplona/amethyst/ui/components/Robohash.kt

@@ -3,6 +3,7 @@ package com.vitorpamplona.amethyst.ui.components
 import android.content.Context
 import android.net.Uri
 import androidx.compose.runtime.Immutable
+import androidx.compose.runtime.Stable
 import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.graphics.toArgb
 import coil.ImageLoader
@@ -61,6 +62,7 @@ private fun svgString(msg: String): String {
 </svg>"""
 }
 
+@Stable
 class HashImageFetcher(
     private val context: Context,
     private val data: Uri

app/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/NotificationScreen.kt

@@ -9,6 +9,7 @@ import androidx.compose.material.Divider
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.DisposableEffect
 import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.Stable
 import androidx.compose.runtime.collectAsState
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.livedata.observeAsState
@@ -189,6 +190,7 @@ fun SummaryBar(model: UserReactionsViewModel) {
     )
 }
 
+@Stable
 class LabelValueFormatter(val axisLabels: List<String>) : AxisValueFormatter<AxisPosition.Horizontal.Bottom> {
     override fun formatValue(
         value: Float,
@@ -198,6 +200,7 @@ class LabelValueFormatter(val axisLabels: List<String>) : AxisValueFormatter<Axi
     }
 }
 
+@Stable
 class CountAxisValueFormatter() : AxisValueFormatter<AxisPosition.Vertical.Start> {
     override fun formatValue(
         value: Float,
@@ -207,6 +210,7 @@ class CountAxisValueFormatter() : AxisValueFormatter<AxisPosition.Vertical.Start
     }
 }
 
+@Stable
 class AmountAxisValueFormatter() : AxisValueFormatter<AxisPosition.Vertical.End> {
     override fun formatValue(
         value: Float,