From f3bbf045b704a3b250ea60210b89ce9db759a8ad Mon Sep 17 00:00:00 2001
From: Max Brunsfeld <maxbrunsfeld@gmail.com>
Date: Mon, 2 Apr 2018 10:05:12 -0700
Subject: [PATCH] Avoid unnecessary stack node retain and release on every push

---
 src/runtime/stack.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/src/runtime/stack.c b/src/runtime/stack.c
index 1ea8a181..60ed6575 100644
--- a/src/runtime/stack.c
+++ b/src/runtime/stack.c
@@ -126,8 +126,6 @@ static StackNode *stack_node_new(StackNode *previous_node, Tree *tree, bool is_p
   *node = (StackNode){.ref_count = 1, .link_count = 0, .state = state, .depth = 0};
 
   if (previous_node) {
-    stack_node_retain(previous_node);
-
     node->link_count = 1;
     node->links[0] = (StackLink){
       .node = previous_node,
@@ -415,7 +413,6 @@ void ts_stack_push(Stack *self, StackVersion version, Tree *tree, bool pending,
   } else if (!tree->extra) {
     head->push_count++;
   }
-  stack_node_release(head->node, &self->node_pool, self->tree_pool);
   head->node = new_node;
 }