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Resolved ANRs on new game screen when user has a lot of maps, by deferring the parsing of most of the map files until after the screen has loaded

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This commit is contained in:
Yair Morgenstern 2023-08-24 11:33:02 +03:00
parent 2028c0569b
commit ac85888cfd
1 changed files with 18 additions and 5 deletions
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23
core/src/com/unciv/ui/screens/newgamescreen/MapFileSelectTable.kt
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@ -16,6 +16,7 @@ import com.unciv.ui.components.input.onChange
import com.unciv.ui.screens.basescreen.BaseScreen
import com.unciv.ui.screens.victoryscreen.LoadMapPreview
import com.unciv.utils.Concurrency
import io.ktor.util.collections.*
import kotlinx.coroutines.Job
import kotlinx.coroutines.isActive
import com.badlogic.gdx.utils.Array as GdxArray
@ -34,7 +35,7 @@ class MapFileSelectTable(
private class MapWrapper(val fileHandle: FileHandle, val mapParameters: MapParameters) {
override fun toString(): String = mapParameters.baseRuleset + " | " + fileHandle.name()
}
private val mapWrappers= ArrayList<MapWrapper>()
private val mapWrappers = ConcurrentSet<MapWrapper>()
private val columnWidth = newGameScreen.getColumnWidth()
@ -53,6 +54,10 @@ class MapFileSelectTable(
mapFileSelectBox.onChange { onSelectBoxChange() }
addMapWrappersSemiAsync()
}
private fun addMapWrappersSemiAsync(){
val mapFilesSequence = sequence<FileHandle> {
yieldAll(MapSaver.getMaps().asSequence())
for (modFolder in RulesetCache.values.mapNotNull { it.folderLocation }) {
@ -60,17 +65,25 @@ class MapFileSelectTable(
if (mapsFolder.exists())
yieldAll(mapsFolder.list().asSequence())
}
}
}.sortedByDescending { it.lastModified() }
for (mapFile in mapFilesSequence) {
// We only really need ONE map to be loaded to tell us "isNotEmpty" and "recentlySavedMapExists"
// The rest we can defer, so that users don't get ANRs when opening the new game screen
// because the game wants to load ALL the maps before first render
fun tryAddMapFile(mapFile: FileHandle){
val mapParameters = try {
MapSaver.loadMapParameters(mapFile)
} catch (_: Exception) {
continue
return
}
mapWrappers.add(MapWrapper(mapFile, mapParameters))
}
for (mapFile in mapFilesSequence) {
if (mapWrappers.isEmpty()) tryAddMapFile(mapFile)
// Each other map is loaded in another thread, so we can multiplex the IO and CPU capabilities
else Concurrency.run { tryAddMapFile(mapFile) }
}
}