From a10531a44d5bb3a3deb84acd4317fcb2059551b6 Mon Sep 17 00:00:00 2001
From: Gary Borton <gdborton@gmail.com>
Date: Tue, 16 Jul 2024 18:42:10 -0700
Subject: [PATCH] Avoid creating a new array inside doResolve.

---
 lib/Resolver.js | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/lib/Resolver.js b/lib/Resolver.js
index ba1dba9..fdb73dc 100644
--- a/lib/Resolver.js
+++ b/lib/Resolver.js
@@ -692,7 +692,11 @@ class Resolver {
 			}
 			newStack.add(stackEntry);
 		} else {
-			newStack = new Set([stackEntry]);
+			// creating a set with new Set([item])
+			// allocates a new array that has to be garbage collected
+			// this is an EXTREMELY hot path, so let's avoid it
+			newStack = new Set();
+			newStack.add(stackEntry);
 		}
 		this.hooks.resolveStep.call(hook, request);