Incredibly slow vehicle modifications

In experimental 3170/0c50595 it takes a long time to repair, remove or install a vehicle part. It seems this also affects several other activities with the length of time it takes depending on the amount of time it takes ingame. This is especially inconvenient when trying to significantly modify or repair a vehicle.

If it is relevant I am playing the SDL version on Xubuntu 15.04 x86_64 with 32bit libs installed.

Does Construction Scaling under world defaults affect this?