diff --git a/test/stream-write-read-perf.c b/test/stream-write-read-perf.c
index d100c9b6..5385f995 100644
--- a/test/stream-write-read-perf.c
+++ b/test/stream-write-read-perf.c
@@ -121,7 +121,7 @@ main () {
 
   printf("generating data ...\n");
 
-  options.size_bytes = 500 * 1024 * 1024L;
+  options.size_bytes = 50 * 1024 * 1024L;
 
   char *data = calloc(options.size_bytes, 1);