From 79bc1f95cb2f328ecb994ea76629b725a2ed7faf Mon Sep 17 00:00:00 2001
From: Mike Farah <mikefarah@gmail.com>
Date: Mon, 11 Oct 2021 12:56:27 +1100
Subject: [PATCH] Slight performance improvement to context.ChildContext

---
 pkg/yqlib/context.go | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/pkg/yqlib/context.go b/pkg/yqlib/context.go
index fe1f372a..6be006f0 100644
--- a/pkg/yqlib/context.go
+++ b/pkg/yqlib/context.go
@@ -43,11 +43,14 @@ func (n *Context) SetVariable(name string, value *list.List) {
 }
 
 func (n *Context) ChildContext(results *list.List) Context {
-	clone := Context{}
-	err := copier.Copy(&clone, n)
-	if err != nil {
-		log.Error("Error cloning context :(")
-		panic(err)
+	clone := Context{DontAutoCreate: n.DontAutoCreate}
+	clone.Variables = make(map[string]*list.List)
+	if len(n.Variables) > 0 {
+		err := copier.Copy(&clone.Variables, n.Variables)
+		if err != nil {
+			log.Error("Error cloning context :(")
+			panic(err)
+		}
 	}
 	clone.MatchingNodes = results
 	return clone