For the clock times within this section, if a single value is given, it represents the number of clock cycles in single-speed (4.194304 MHz) mode (e.g. a nop is 4 clocks), while the number of clocks in double-speed mode is both unknown and unassumed. If two values are given, they represent first the clocks in single-speed mode and second the clocks in double-speed (8.388608 MHz) mode (e.g. a nop is 4/4 clocks; an HDMA transfer is 32/64 clocks).
A single scanline is 456/908 clocks.
By AntonioND's tests in section 8, Mode 2 (OAM search) consistently takes 80/160 clocks.
By Kevtris' tests, Mode 3 (data transfer) takes 173.5 clocks at a minimum (clocks in double-speed mode unknown since this involves non-CPU communication).