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Discussion on: Why don't sites put more effort into web performance?

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Scott Hannen

When planning how a site or feature should behave there's often no discussion of performance. Perhaps it's just assumed that it should be fast, but that's problematic because there is no clear definition of "fast." If no one knows how fast it's supposed to be then no one will know if it's too slow.

Without that consciousness there's nothing to stop developers from gradually adding bits and pieces that slow it down even more. Unless something takes ten seconds they might not pay attention to anything besides whether it functions as expected.

If performance is included up front then it becomes a constraint that's factored into every decision.