From e03d3e1c57cbb50a190cfa028d192f124beac7ed Mon Sep 17 00:00:00 2001
From: Martin Evans <martindevans@gmail.com>
Date: Fri, 1 Dec 2023 19:01:31 +0000
Subject: [PATCH] Removed a use of `GetBytes` in `Instance.TryGetExtern` and
 using a stack buffer instead. (#287)

---
 src/Instance.cs | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/Instance.cs b/src/Instance.cs
index fdc8772..7dadd4c 100644
--- a/src/Instance.cs
+++ b/src/Instance.cs
@@ -581,10 +581,11 @@ public Instance(Store store, Module module, params object[] imports)
 
         private bool TryGetExtern(StoreContext context, string name, out Extern ext)
         {
+            using var nameBytes = name.ToUTF8(stackalloc byte[Math.Min(64, name.Length * 2)]);
+
             unsafe
             {
-                var nameBytes = Encoding.UTF8.GetBytes(name);
-                fixed (byte* ptr = nameBytes)
+                fixed (byte* ptr = nameBytes.Span)
                 {
                     return Native.wasmtime_instance_export_get(context.handle, this.instance, ptr, (UIntPtr)nameBytes.Length, out ext);
                 }