Personally I think the reason they were faster than today is abstractions. Today developing a video game for a browser doesn’t require you to know anything abou

Personally I think the reason they were faster than today is abstractions. Today developing a video game for a browser doesn’t require you to know anything about the details of graphics or pixels or GPU. Such abstractions - such as the V8 engine or a video game library - allows ease of development, hence easier to hire people that can manage and understand it. Unfortunately the abstraction comes at a cost - in CPU cycles.