From: kwc@citi.umich.edu <kwc@citi.umich.edu>
Date: Mon, 3 Jul 2006 22:34:33 +0000 (-0400)
Subject: Change default buffer size increment for readline()
X-Git-Tag: nfs-utils-1-0-9~20
X-Git-Url: https://git.decadent.org.uk/gitweb/?p=nfs-utils.git;a=commitdiff_plain;h=ee664fd246d77010af13fb557407c612752a5ea8

Change default buffer size increment for readline()

Signed-off-by: Kevin Coffman <kwc@citi.umich.edu>

The readline routine expects much smaller messages than we are passing.
Change the default initial allocation and increment value from 128
to 2048.  This saves many calls to realloc().
---

diff --git a/utils/gssd/cacheio.c b/utils/gssd/cacheio.c
index ac76c06..07658e9 100644
--- a/utils/gssd/cacheio.c
+++ b/utils/gssd/cacheio.c
@@ -244,6 +244,8 @@ int qword_get_int(char **bpp, int *anint)
 	return 0;
 }
 
+#define READLINE_BUFFER_INCREMENT 2048
+
 int readline(int fd, char **buf, int *lenp)
 {
 	/* read a line into *buf, which is malloced *len long
@@ -254,11 +256,11 @@ int readline(int fd, char **buf, int *lenp)
 	int len;
 
 	if (*lenp == 0) {
-		char *b = malloc(128);
+		char *b = malloc(READLINE_BUFFER_INCREMENT);
 		if (b == NULL)
 			return 0;
 		*buf = b;
-		*lenp = 128;
+		*lenp = READLINE_BUFFER_INCREMENT;
 	}
 	len = read(fd, *buf, *lenp);
 	if (len <= 0) {
@@ -271,7 +273,7 @@ int readline(int fd, char **buf, int *lenp)
 	 */
 		char *new;
 		int nl;
-		*lenp += 128;
+		*lenp += READLINE_BUFFER_INCREMENT;
 		new = realloc(*buf, *lenp);
 		if (new == NULL)
 			return 0;