jackalope/jackalope — comment on commit 86ff3110136e3d774bff0810ad8d6000600e6f6d
File: src/Jackalope/Repository.php line 55
By dbu:

this was only inteded for things that you might want to disable because it can cost some performance. i think we do not need to make locking optional. if you don't use it, it costs no performance at all.