interval-sets: a little bit faster by not using slices.
interval-sets: a little bit faster by not using slices.

sarvex/factor-lang,bjourne/factor,bpollack/factor,bpollack/factor,tgunr/factor,nicolas-p/factor,bjourne/factor,nicolas-p/factor,slavapestov/factor,sarvex/factor-lang,bjourne/factor,dch/factor,AlexIljin/factor,slavapestov/factor,AlexIljin/factor,AlexIljin/factor,tgunr/factor,sarvex/factor-lang,mrjbq7/factor,bjourne/factor,tgunr/factor,slavapestov/factor,AlexIljin/factor,dch/factor,sarvex/factor-lang,nicolas-p/factor,factor/factor,bjourne/factor,nicolas-p/factor,mrjbq7/factor,tgunr/factor,AlexIljin/factor,bjourne/factor,dch/factor,factor/factor,slavapestov/factor,dch/factor,bpollack/factor,mrjbq7/factor,nicolas-p/factor,tgunr/factor,bpollack/factor,tgunr/factor,bpollack/factor,slavapestov/factor,slavapestov/factor,dch/factor,bpollack/factor,factor/factor,mrjbq7/factor,nicolas-p/factor,AlexIljin/factor,bpollack/factor,mrjbq7/factor,sarvex/factor-lang,AlexIljin/factor,sarvex/factor-lang,factor/factor,slavapestov/factor,sarvex/factor-lang,nicolas-p/factor,bjourne/factor,factor/factor,mrjbq7/factor,factor/factor,dch/factor