-

~/src/xbps(master ✗) time xbps-uhelper digest /tmp/testfile
78cb14b60e49246fa5db70e63b44272367a7eb8acb16bc18d62eec682787915d
xbps-uhelper digest /tmp/testfile  3.12s user 0.52s system 99% cpu 3.644 total
~/src/xbps(master ✗) time LD_PRELOAD=lib/libxbps.so.2.0.0 xbps-uhelper digest /tmp/testfile
78cb14b60e49246fa5db70e63b44272367a7eb8acb16bc18d62eec682787915d
LD_PRELOAD=lib/libxbps.so.2.0.0 xbps-uhelper digest /tmp/testfile  2.73s user 0.10s system 99% cpu 2.832 total
~/src/xbps(master ✗) git diff|cat
diff --git a/lib/util_hash.c b/lib/util_hash.c
index 6306dfb..a374c33 100644
--- a/lib/util_hash.c
+++ b/lib/util_hash.c
@@ -65,7 +65,7 @@ xbps_file_hash(const char *file)
 	char hash[SHA256_DIGEST_LENGTH * 2 + 1];
 	unsigned char digest[SHA256_DIGEST_LENGTH];
 	ssize_t ret;
-	unsigned char buf[256];
+	unsigned char buf[4096];
 	int fd;
 
 	if ((fd = open(file, O_RDONLY)) == -1)
~/src/xbps(master ✗)