The main issue with net/http is that it generates a lot of garbage which is definitely going to show up in your profile if you're handling a lot of requests per second.
Allocation pressure imposed by net/http has never been a top K source of profile CPU burn in any service I’ve ever written, and I’ve written plenty of high-performance, high-QPS services. fasthttp is rarely if ever a good idea.
The purpose of Mining is not to hand out new coins, this is only done to incentivise mining. The real reason behind mining is to secure the transactions. Mining prevents people from double spending their coins.
Yes both Chrome and Firefox would automatically try the next IP when I checked a couple of months ago. We used to use this for load balancing, returning the IPs of our servers in random order. Even when one of the servers would go down we wouldn't loose any traffic as browser would just use the next one.
I use to live next to a highway with the closets exit being a few miles away and I would constantly get drivers on the highway as my closest driver. I always had to cancel since they were actually ~15 minutes away, not 3-5.
I have found that Uber's estimates get better with time. When Uber was newer in my city, it used to give ridiculous underestimates. They've become far more realistic now.
Yes I have noticed the exact same thing on Reddit lately. My guess it's because they started sending "Cache-Control: no-cache" which prevents Firefox to cache the page for the back button.