Reuse collator instance

core/base/src/main/java/de/mm20/launcher2/search/SavableSearchable.kt

@@ -6,7 +6,7 @@ import android.os.Bundle
 import de.mm20.launcher2.icons.LauncherIcon
 import de.mm20.launcher2.icons.StaticLauncherIcon
 import de.mm20.launcher2.ktx.romanize
-import java.text.Collator
+import de.mm20.launcher2.text.Collator
 
 interface SavableSearchable : Searchable, Comparable<SavableSearchable>  {
     val key: String
@@ -37,8 +37,7 @@ interface SavableSearchable : Searchable, Comparable<SavableSearchable>  {
     override fun compareTo(other: SavableSearchable): Int {
         val label1 = labelOverride ?: label
         val label2 = other.labelOverride ?: other.label
-        return Collator.getInstance().apply { strength = Collator.SECONDARY }
-            .compare(label1.romanize(), label2.romanize())
+        return Collator.compare(label1.romanize(), label2.romanize())
     }
 
     val domain: String

core/base/src/main/java/de/mm20/launcher2/text/Collator.kt

@@ -0,0 +1,17 @@
+package de.mm20.launcher2.text
+
+import android.icu.text.Collator
+import kotlin.concurrent.getOrSet
+
+
+private val threadLocalCollator = ThreadLocal.withInitial { 
+    android.icu.text.Collator.getInstance().apply { 
+        strength = android.icu.text.Collator.SECONDARY
+    }
+}
+
+val Collator = threadLocalCollator.getOrSet { 
+    android.icu.text.Collator.getInstance().apply { 
+        strength = android.icu.text.Collator.SECONDARY
+    }
+}