From 5fa29da68073281216c7c062c4687ef8081b68d4 Mon Sep 17 00:00:00 2001
From: XANTRONIX Development <dev@xantronix.com>
Date: Tue, 21 Jul 2020 17:44:18 -0400
Subject: [PATCH] Make fd_clear() in src/server.c faster

---
 src/server.c | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/src/server.c b/src/server.c
index 305dd51..124b22d 100644
--- a/src/server.c
+++ b/src/server.c
@@ -144,13 +144,15 @@ static inline void fd_clear(patty_ax25_server *server, int fd) {
 
     FD_CLR(fd, &server->fds_watch);
 
-    for (i=0; i<8*sizeof(&server->fds_watch); i++) {
-        if (FD_ISSET(i, &server->fds_watch)) {
-            server->fd_max = i;
+    if (server->fd_max == fd + 1) {
+        for (i=0; i<8*sizeof(&server->fds_watch); i++) {
+            if (FD_ISSET(i, &server->fds_watch)) {
+                server->fd_max = i;
+            }
         }
-    }
 
-    server->fd_max++;
+        server->fd_max++;
+    }
 }
 
 static patty_ax25_sock *sock_by_fd(patty_dict *dict,