Performance questions get generic answers unless you bring a number. Whether the delay is before or after the first byte splits the search space in half, so the answer comes back about the right layer.
[Screen] used to load quickly and now feels slow. Do not change code.
What I measured: total load time, the largest single request, and whether the delay is before or after the first byte.
Ask me for any measurement you need that is missing. Then give the three most likely causes for this stack, ranked, and for each: the one file to open, and the one number that would confirm it.
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