Posts Tagged ‘percentile

In the previous article in this series, I talked about the fallacy of ‘average’ performance. Now that this has been dismissed, what do I propose to replace it with. There are three aggregated values that can be used to better represent Web performance data:

Median
Geometric Mean
85th (or higher) Percentile

The links take you to articles that better [...]

Last night I made some code modifications to the Line Graph (“Basic Chart”) function in GrabPERF. Previously, the performance graph had been built using data gathered from the rollup table, hourly_site, except for the current hour, which was built from the raw data table, data.
Now, both the Availability and Performance graphs are built from the [...]


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Stephen Pierzchala is one of a 10-year veteran of the Web performance field who also writes on topics that interest his non-linear world-view.

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