From de82f8f7e9ec48da5cb7dfa9ce7ec995bc7ff2a5 Mon Sep 17 00:00:00 2001
From: Stefan Rueger <stefan.rueger@urclocks.com>
Date: Fri, 10 May 2024 17:58:50 +0100
Subject: [PATCH] Comment use of static variable as r/o cache

---
 src/strutil.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/strutil.c b/src/strutil.c
index 40b19daf..26110862 100644
--- a/src/strutil.c
+++ b/src/strutil.c
@@ -1167,7 +1167,7 @@ static size_t csubs(size_t w, unsigned char c1, unsigned char c2) {
   if(w < 8)
     w = 8;
 
-  static size_t wmat[128][128];
+  static size_t wmat[128][128]; // Compute once, read-only cache
   if(!wmat[0][1])               // Initialize weight matrix
     for(size_t k1 = 0; k1 < 128; k1++)
       for(size_t k2 = 0; k2 < 128; k2++)