caller controls threshold for bulk-loading chunks in IterateChunks (#222)

* Allow caller to control threshold for bulk-loading chunks in IterateChunks
* use smaller batch chunk reading for /fileinfos and /chunkinfos as we do not intend to read the payload
* use smaller batch read buffer when just querying for size of attachments

1 files changed, 2 insertions, 1 deletions

diff --git a/src/zenstore/blockstore.cpp b/src/zenstore/blockstore.cpp
index 8a6d9c18d..fcf934344 100644
--- a/src/zenstore/blockstore.cpp
+++ b/src/zenstore/blockstore.cpp
@@ -1634,7 +1634,8 @@ TEST_CASE("blockstore.iterate.chunks")
 							break;
 					}
 					return true;
-				});
+				},
+				0);
 			CHECK(Continue);
 		});
 		return true;