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 ac76c065d09a023cfa9d562ce199139d189de1b5..07658e977a16685be7375e0a6f5ba9fbfb55da74 100644 (file)
--- 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;