command overhead vs command processing overhead time

command overhead and command processing overhead time both are nouns.

Word	Noun	Adjective	Verb	Adverb
command overhead	Yes	No	No	No
command processing overhead time	Yes	No	No	No

As nouns, command overhead and command processing overhead time are synonyms defined as:

command overhead and command processing overhead time: (computer science) the processing time required by a device prior to the execution of a command

Other synonyms of command overhead include command processing overhead, overhead.

command overhead (noun)	command processing overhead time (noun)
(computer science) the processing time required by a device prior to the execution of a command	(computer science) the processing time required by a device prior to the execution of a command