Michael Mifsud of 99designs:
We began a small-scale rollout for static assets earlier this year. After building confidence in our new infrastructure, we began transitioning our static assets to HTTP/2. Surprisingly, some sections of our platform felt noticeably slower. This post will cover our investigation into the performance regressions we experienced by adopting HTTP/2.
So, should you then move to HTTP/2? As per usual, the answer is “It Depends”:
For a typical image rich, latency–bound page using a high–speed, low–latency connection, visual completion was achieved 5% faster on average.
For an extremely image–heavy, bandwidth–bound page using the same connection, visual completion was achieved 5–10% slower on average.