Space saving steps

[Toolmaker51]

Nope. Ship ladders beat all.
Simply because when superiors aren't watching most bridge crew hold the handrails and slide. Can descend 9 or 10 decks in way less than a minute, I reckon about 40 seconds. The next ladder is about 7' away; most of it you're still holding the lower end loop and make a turn like a roping pony.
Unless you are too tall, and bean yourself on the hatchway.

I recall only one Lapereyre stair, at TESLA in Reno. Going up was fine, a lot like walking, despite a very fast rise angle. That made descending not so hot, instead of toes in the stepwell,you barely had heels going the other way.