- Kill <gpu>. Was not doing anything.
- A warning is emitted for unit-less values (they are still accepted).
+ The value 0 can remain unit-less, as its unit does not matter.
- speed. Default: 'f' or 'flops'. Also defined:
'Yf', 'Zf', 'Ef', 'Pf', 'Tf', 'Gf', 'Mf', 'kf'