Depends on what are you doing. For any programmer working on a bigger project, where compilation time is greater than 2s, (let's say) 4x more power is superb.
If your code compiles in ~16 seconds, reducing that to 4 would add comfort.
If your code compiles 60 seconds, reducing that to 15 would allow not losing concentration.
If your code compiles in 60 minutes, reducing that to 15 minutes would actually allow to do any work on that (not that it's not possible, but it's really not pleasant).
If your code compiles in ~16 seconds, reducing that to 4 would add comfort.
If your code compiles 60 seconds, reducing that to 15 would allow not losing concentration.
If your code compiles in 60 minutes, reducing that to 15 minutes would actually allow to do any work on that (not that it's not possible, but it's really not pleasant).