I might intuit that 'request batching' could be benefit http/2 but probably not what they were thinking about. And you'd have to have a lot of simultaneous http

I might intuit that 'request batching' could be benefit http/2 but probably not what they were thinking about. And you'd have to have a lot of simultaneous http requests for it to help at all. But I'm with you on trying to batch this with your JS should not be a browser thing or even a built in standard library JS function. One could do it themselves - maybe graphQl kind of this idea of more complex queries + maybe just throw the requests you want to make into an array and when it hits length = 5 send them all at once. But I don't see how that would help response times at all.