input: Increase chunk size from 16KB to 4MB.

This not only slightly speeds up loading files, but more importantly leads
to larger chunks being passed to input modules (and later potentially output
modules), some of which can have a large performance penalty for small chunks.

In the specific case of e.g. binary input and an .sr output file this change
can lead to a speedup of 220x or more (due to larger chunks for srzip).

diff --git a/input.c b/input.c
index 21c28cd70a74467e665eab3440324b728e6402c9..9a9545f22997b1c3b1a48b7b357261bc0d0aaf38 100644 (file)
--- a/input.c
+++ b/input.c
@@ -28,7 +28,7 @@
 #include <glib.h>
 #include "sigrok-cli.h"
 
-#define BUFSIZE (16 * 1024)
+#define BUFSIZE (4 * 1024 * 1024)
 
 static void load_input_file_module(void)
 {