From d155f7e879e444e60a3f070a3efb7188b4b0a792 Mon Sep 17 00:00:00 2001
From: Damian Gryski <damian@gryski.com>
Date: Tue, 13 Mar 2018 09:07:50 -0700
Subject: [PATCH] warning about mmap loading vs. complexity/speed

---
 performance.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/performance.md b/performance.md
index b4d6223..dedefe3 100644
--- a/performance.md
+++ b/performance.md
@@ -822,6 +822,7 @@ allocate it. But you also pay every time the garbage collection runs.
 * Common uses for unsafe
 * mmap'ing data files
   * struct padding
+  * but not always sufficiently faster to justify cost
 * speedy de-serialization
 * string <-> slice conversion, []byte <-> []uint32, ...