From c4ef0076084aa15567b1464ef94108228c18fbfc Mon Sep 17 00:00:00 2001
From: Andrei Cheboksarov <37665782+cheb0@users.noreply.github.com>
Date: Wed, 15 Jul 2026 12:03:50 +0400
Subject: [PATCH] single call site when tree fold

---
 node/builder.go | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/node/builder.go b/node/builder.go
index 80ab62d33..0b3ecd83f 100644
--- a/node/builder.go
+++ b/node/builder.go
@@ -36,8 +36,10 @@ func treeFold[V any](op func(V, V) V, values []V) V {
 
 	mid := len(values) / 2
 
-	return op(
-		treeFold(op, values[:mid]),
-		treeFold(op, values[mid:]),
-	)
+	// single call site to prevent stack traces explosion of alloc samples on ultra-deep OR trees
+	var children [2]V
+	for i, part := range [2][]V{values[:mid], values[mid:]} {
+		children[i] = treeFold(op, part)
+	}
+	return op(children[0], children[1])
 }