all–time 
/ˈɑ:lˌtaɪm/ adjective
always used before a noun /ˈɑ:lˌtaɪm/ adjective : more than all others have ever been
▪ It's my all-time favorite movie. ▪ The price of gasoline has hit an all-time high. [=the price is higher than it has ever been]
▪ It's my all-time favorite movie. ▪ The price of gasoline has hit an all-time high. [=the price is higher than it has ever been]
