Also, it makes no sense. The F5 key doesn't initiate remote functions - unless HN is coded to, which doesn't seem logical.
As for 3 seconds being enough, shrug. Not something I feel like testing.
Source: https://news.ycombinator.com/item?id=4761102
Also, it makes no sense. The F5 key doesn't initiate remote functions - unless HN is coded to, which doesn't seem logical.