bump tree cache size; some operations are doing lots of tree walks
diff --git a/lib/object_cache.c b/lib/object_cache.c
index 086dccc..1e3d2dc 100644
--- a/lib/object_cache.c
+++ b/lib/object_cache.c
@@ -33,7 +33,7 @@
#include "got_lib_object_cache.h"
#define GOT_OBJECT_CACHE_SIZE_OBJ 1024
-#define GOT_OBJECT_CACHE_SIZE_TREE 128
+#define GOT_OBJECT_CACHE_SIZE_TREE 2048
#define GOT_OBJECT_CACHE_SIZE_COMMIT 512
const struct got_error *