[Bug-ddrescue] Option to exit when minimum-read-rate threshold is reached?

[Paul Daniels]

Carrying on from my previous message earlier today,  I have found the 
drive will produce decent data transfer rates for about 300~500MB of 
transfers before dropping to about 64KB/sec.

Is there a way I can make ddrescue terminate if the read rate drops 
below the --minimum-read-rate=<bytes> level?  Is this a feature 
somewhere I might have missed?

While I have a script written that'll just read 300MB blocks and power 
cycle the drive, I would prefer to minimise the power cycling by instead 
letting ddrescue detect when the read rate has dropped off and them 
terminate.

Thank you in advance.

Regards,

Paul.