From 370d5b499f9c02c50fbd62f3291a53fbe8aea9b3 Mon Sep 17 00:00:00 2001
From: Adam Izraelevitz
Date: Tue, 25 Dec 2018 11:00:42 -0500
Subject: Performance fix of Uniquify for deep bundles (#980)

---
 src/main/scala/firrtl/annotations/AnnotationUtils.scala | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'src/main/scala/firrtl/annotations/AnnotationUtils.scala')

diff --git a/src/main/scala/firrtl/annotations/AnnotationUtils.scala b/src/main/scala/firrtl/annotations/AnnotationUtils.scala
index ba9220f7..72765ab7 100644
--- a/src/main/scala/firrtl/annotations/AnnotationUtils.scala
+++ b/src/main/scala/firrtl/annotations/AnnotationUtils.scala
@@ -51,8 +51,8 @@ object AnnotationUtils {
     case Some(_) =>
       val i = s.indexWhere(c => "[].".contains(c))
       s.slice(0, i) match {
-        case "" => Seq(s(i).toString) ++ tokenize(s.drop(i + 1))
-        case x => Seq(x, s(i).toString) ++ tokenize(s.drop(i + 1))
+        case "" => s(i).toString +: tokenize(s.drop(i + 1))
+        case x => x +: s(i).toString +: tokenize(s.drop(i + 1))
       }
     case None if s == "" => Nil
     case None => Seq(s)
-- 
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