Above the fold time (AFT) measures web page performance by applying heuristics to a video or filmstrip view of a page loading. It focuses on what the user sees while at the same time producing consistent results across multiple runs and different browsers. This presentation will cover (1) the motivation for AFT, (2) overview the algorithm, and (3) how to collect AFT on webpagetest.org.
Jake Brutlag is a data analyst with 10 years of industry experience, first at Microsoft, then at Google. He has published papers on distinct value estimation, email classification, aberrant behavior detection for network time series, and search engine latency.