(Replay employee) Yeah, later in the post (https://medium.com/replay-io/effective-determinism-54cc91f5693c https://medium.com/replay-io/effective-determinism-54

(Replay employee) Yeah, later in the post (https://medium.com/replay-io/effective-determinism-54cc91f5693c https://medium.com/replay-io/effective-determinism-54cc91f56...) we mention needing mitigations to ensure that hashtable iteration is deterministic in cases where it affects how the browser interacts with the JS engine. There are others needed as well to ensure that the browser behaves the same across a large range of websites, my favorite is handling sites that sniff information about the system's math libraries by e.g. calling Math.sin() on specific values and testing the results --- the values when replaying need to be bitwise identical with what happened while recording.