if-else VS case-else VS case

[Prestige]

I'm not sure, but I'll provide my runtimes of these benchmarks:

`nim r -d:release foo.nim`:
    
    
    if-else: 0.086073489
    case-else: 0.10265143
    case-all: 0.14253516
    
    
    Run

`nim r foo.nim`:
    
    
    if-else: 0.346636164
    case-else: 0.249107282
    case-all: 0.313689373
    
    
    Run