Ask HN: How much traffic can GCP's f1-micro handle?

According to GCP's free tier page [0], f1-micro is offered for free coupled with 1GB bandwith(?). But I wonder how many users per second can this instance handle? Will it survive "HackerNews spike"? (let's say 400-500 realtime users for a few hours per month)? Any resources to learn more about how to roughly map traffic to number/type of instance, if that is what people do?

[0] https://cloud.google.com/free/