Micro optimisation

Author: allanrenucci

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

@@ -549,7 +549,8 @@ object Names {
   private def hashValue(cs: Array[Char], offset: Int, len: Int): Int = {
     var i = offset
     var hash = 0
-    while (i < len + offset) {
+    val until = offset + len
+    while (i < until) {
       hash = 31 * hash + cs(i)
       i += 1
     }