Yep, I can totally relate. I found multiple bugs in a MessagePack JS implementation that were related to this issue. I also worked on a project once where uniq

Yep, I can totally relate. I found multiple bugs in a MessagePack JS implementation that were related to this issue. I also worked on a project once where unique IDs of objects could get quite large (because they were random u64 integers). Those IDs were serialized and sent to a browser. Sometimes two objects were viewed as "the same" in the browser application because their IDs were truncated by the floating point precision issue.