Earlier quoted context omitted.
> server-side rendering for each request in V8 might be more expensive to host than client side rendering in V8? Expensive not in money terms, but in user experience. Also: if you are doing e-commerce, 100ms added latency can cost you 7-8% in conversions. Spending 5% more on hosting to do SSR just makes economic sense.
> 100ms added latency can cost you 7-8% in conversions i hear this metric (or something equally absurd) cited frequently and have never seen it to be true in my own experience. i guess if you have to load a product page with 100 images (or assets) and each has 100ms network latency, then it will add up to much more than that. but 100ms for a single interaction or network request (e.g. process payment POST) is not goi…
It's sort of true but also a massive over simplification. The relationship between conversion and speed is not linear. Some people are beyond help, and others already have it so good they only notice the most extreme degradation in performance.
It's also hard to isolate confounding factors like users who have fast infrastructure tend to be rich and rich people buy more stuff. Making pages load faster doesn't give them more money to buy stuff.
Overall faster is definitely better but the specific magnitude will depend on your customer demographics. In our case the Amazon 100ms saved = 1% more sales was close enough for a rule of thumb.