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Date: Sat, 9 Sep 1995 14:04:54 +0159
From: Wolfram Schneider <wosch@freebsd.first.gmd.de>
Message-Id: <199509091205.OAA18842@freebsd.first.gmd.de>
To: current@freebsd.org, wosch@freebsd.first.gmd.de
Subject: 20-40% faster wc(1)
Sender: current-owner@freebsd.org
Precedence: bulk

--- 1.1	1995/09/09 11:30:35
+++ Makefile	1995/09/09 11:34:03
@@ -1,5 +1,6 @@
 #	@(#)Makefile	8.1 (Berkeley) 6/6/93
 
 PROG=	wc
+CFLAGS+= -DOPT
 
 .include <bsd.prog.mk>
--- 1.1	1995/09/09 11:30:35
+++ wc.c	1995/09/09 11:33:01
@@ -122,6 +122,14 @@
 	struct stat sb;
 	int fd;
 	u_char buf[MAXBSIZE];
+#ifdef OPT
+        u_char spbuf[256]; /* buffer for isspace lookup */
+
+        for (ch = 0; ch < 256; ch++)
+            spbuf[ch] = isspace(ch);
+#define ISSPACE(x) spbuf[x]
+#endif
+
 
 	fd = STDIN_FILENO;
 	linect = wordct = charct = 0;
@@ -183,7 +191,11 @@
 			ch = *p++;
 			if (ch == '\n')
 				++linect;
-			if (isspace(ch))
+#ifdef OPT
+                        if (ISSPACE(ch))
+#else
+                        if (isspace(ch))
+#endif
 				gotsp = 1;
 			else if (gotsp) {
 				gotsp = 0;