They saying 2nd gen is
Concurrency: Process up to 1000 concurrent requests with a single function instance,
minimizing cold starts and improving latency when scaling.
but as far as I know..
pre ver Cloud function`s maximum concurrent invocation of a single instance is 3000
so is it kinda downgrade??
Gen 1 functions can only handle 1 concurrent request at a time per instance. This means that while your code is processing one request, there is no possibility of a second request being routed to the same instance.
Gen 2 functions on the other hand can handle up to 1000 concurrent requests per function instance.