From 02e46bdb40b76c9f7803dd1ae4f18b388f9d55a4 Mon Sep 17 00:00:00 2001
From: Jack Koenig
Date: Fri, 17 Dec 2021 09:25:38 -0800
Subject: Modify and optimize performance of propagate annotations (#2393)

* Change AnnotationSeq underlying from List to Seq

It was nothing but pointless copying.

* Make propagateAnnotations faster

There was lots of expensive logic for very little benefit.---
 src/main/scala/firrtl/transforms/DedupAnnotations.scala | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'src/main/scala/firrtl/transforms')

diff --git a/src/main/scala/firrtl/transforms/DedupAnnotations.scala b/src/main/scala/firrtl/transforms/DedupAnnotations.scala
index cad4d2be..9aad2fee 100644
--- a/src/main/scala/firrtl/transforms/DedupAnnotations.scala
+++ b/src/main/scala/firrtl/transforms/DedupAnnotations.scala
@@ -95,7 +95,7 @@ class DedupAnnotationsTransform extends Transform with DependencyAPIMigration {
   def execute(state: CircuitState): CircuitState = CircuitState(
     state.circuit,
     state.form,
-    DedupAnnotationsTransform.dedupAnnotations(state.annotations.underlying, InstanceKeyGraph(state.circuit)),
+    DedupAnnotationsTransform.dedupAnnotations(state.annotations.toSeq, InstanceKeyGraph(state.circuit)),
     state.renames
   )
 }
-- 
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