I am preparing to do the compression test for my car,never done such a thing before, i gathered some info about the procedure,and got some steps to be cleared if possible:

1- Is it better to disconnect all the coils and spark plugs,or is it better to test one cylinder at a time?
2- After the fuel system is disabled, and pressing the gas pedal then cranking the engine,do i crank till the gague holds to the highest reading,or there are nomber of strokes should be accomplished; 4,5...?
3- Are there any cautions or any additional tips for this procedure?

TIA

jj