This is silly, though. For many reasons. First, I have no axe to grind. They found a trivial change that can be made and made it. Probably even simplified t

This is silly, though. For many reasons. First, I have no axe to grind. They found a trivial change that can be made and made it. Probably even simplified the code, as they used a better search that was introduced later in the codebase. Kudos on that! Second, it also clearly took them more than 2 hours. They've been working at making it faster for many days at this point. So, it will take them a long long time to realize this particular gain. Finally, my only two "criticisms" this entire time were on calling this a 7% improvement and claiming that searching for this would be a waste of most teams time. Consider, from that headline most folks should assume that they can get their EC2 instance that is running FreeBSD 7% faster. But, they clearly won't be able to. They won't even get a lambda invocation 7% faster. Nothing anyone anywhere will ever see will ever be 7%. They may see something 2ms faster, and that is, itself awesome. And may claim that this would be a waste of time to search for is irrelevant for this team. They weren't looking for this particular change to make, of course, so that this "criticism" isn't relevant to them. At all.