Group similar events happening at the same time

[rocktimsaikia]

The original GitHub feed generally groups the similar events happening at the same timestamp.
I don't really know the exact algorithm they use there. Initially, I thought they are grouping similar events that are happening in the same hour but turns out that is not the case.
There is no constant number for that. It groups similar events in a very efficient way. I am still doing a bit of research on this but if anyone has any approach we can take to achieve the same result then I am open to discussion