vis

commit f514cebb9f1f6cb62944b85de39c37529817c0b2
parent 4c1dacde513a2c8ef9fbbb685fdfd2f7a34b6f40
Author: Marc André Tanner <mat@brain-dump.org>
Date:   Fri, 20 Nov 2015 15:35:37 +0100

buffer: tweak memory allocation strategy

Do not simply double the requested size. Instead take the maximum of

 - the requested size
 - double the current buffer size

This will use less memory for large register operations (e.g. deleting
the whole file).

Diffstat:
M
buffer.c
 | 
5
+----

1 file changed, 1 insertion(+), 4 deletions(-)
diff --git a/buffer.c b/buffer.c
@@ -15,10 +15,7 @@ bool buffer_grow(Buffer *buf, size_t size) {
 	if (size < BUF_SIZE)
 		size = BUF_SIZE;
 	if (buf->size < size) {
-		/* if this is not the first allocation i.e. the buffer is
-		 * currently full, double the size to avoid memory pressure */
-		if (buf->size > 0)
-			size *= 2;
+		size = MAX(size, buf->size*2);
 		char *data = realloc(buf->data, size);
 		if (!data)
 			return false;