Avoid unnecessary toString

Author: odersky

compiler/src/dotty/tools/dotc/core/TypeComparer.scala

@@ -1020,7 +1020,7 @@ class TypeComparer(@constructorOnly initctx: Context) extends ConstraintHandling
  case info2: TypeBounds =>
  compareLower(info2, tyconIsTypeRef = true)
  case info2: ClassInfo =>
- tycon2.name.toString.startsWith("Tuple") &&
+ tycon2.name.startsWith("Tuple") &&
  defn.isTupleType(tp2) && recur(tp1, tp2.toNestedPairs) ||
  tryBaseType(info2.cls)
  case _ =>

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

@@ -39,13 +39,13 @@ class Instrumentation extends MiniPhase { thisPhase =>
  ctx
 
  private def record(category: String, tree: Tree)(using Context): Tree = {
- val key = Literal(Constant(s"$category${tree.sourcePos.show}"))
+ val key = Literal(Constant(s"$category@${tree.sourcePos.show}"))
  ref(defn.Stats_doRecord).appliedTo(key, Literal(Constant(1)))
  }
 
  override def transformApply(tree: Apply)(using Context): Tree = tree.fun match {
  case Select(nu: New, _) =>
- cpy.Block(tree)(record(i"alloc/${nu.tpe}@", tree) :: Nil, tree)
+ cpy.Block(tree)(record(i"alloc/${nu.tpe}", tree) :: Nil, tree)
  case Select(_, name) if namesToRecord.contains(name) =>
  cpy.Block(tree)(record(i"alloc/$name", tree) :: Nil, tree)
  case _ =>