Performance tweak (thanks @smarter)

Author: liufengyun

compiler/src/dotty/tools/dotc/transform/SpecializeFunctions.scala

@@ -16,9 +16,12 @@ class SpecializeFunctions extends MiniPhase with InfoTransformer {
   val phaseName = "specializeFunctions"
   override def runsAfter = Set(ElimByName.name)
 
+  override def infoMayChange(sym: Symbol)(using Context): Boolean =
+    !sym.is(Flags.Package) && sym.isDefinedInCurrentRun
+
   /** Transforms the type to include decls for specialized applys  */
   override def transformInfo(tp: Type, sym: Symbol)(using Context) = tp match {
-    case tp: ClassInfo if !sym.is(Flags.Package) =>
+    case tp: ClassInfo =>
       val newApplys = new mutable.ListBuffer[Symbol]
 
       var arity = 0