What does your performance “stack” look like? There are all kinds of tools available for measuring page speed, but what data and assumptions do they use to measure performance? And speaking of measuring performance, there’s quite a difference between that and monitoring performance. Geoff Graham evaluates the data of different tools for measuring page speed performance and looks specifically at DebugBear, a commercial offering, that pulls together the best metrics for not only measuring performance, but monitoring it over time as well.
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