Comment by masklinn

> Also, some languages intentionally randomize the order per program run, to avoid things like users intentionally stuffing hash tables with colliding keys.

Most modern langages do that as part of hashdos mitigation, Python did that until it switched to a naturally ordered hashmap, then made insertion order part of the spec. Importantly iteration order remains consistent with a process (possibly on a per-hashmap basis).

Notably, Go will randomise the starting point of hashmap iteration on each iteration.