Enable optimisations in Expr.run

Author: nicolasstucki

compiler/src/dotty/tools/dotc/quoted/QuoteDriver.scala

@@ -15,8 +15,7 @@ class QuoteDriver extends Driver {
 
   def run[T](expr: Expr[T]): T = {
     val ctx: Context = initCtx.fresh
-    // TODO enable optimisation?
-    // ctx.settings.optimise.update(true)(ctx)
+    ctx.settings.optimise.update(true)(ctx)
 
     val outDir = new VirtualDirectory("(memory)", None)