This first-of-its-kind paired-test analysis reveals many previously unknown To characterize the behavior of these tools in wide-areaĭeployment, we collect more than 80,000 pairs of Ookla and NDT7 measurementsĪcross nine months and 126 households, with a range of ISPs and speed tiers. Networks that experience high latency, where Ookla consistently reports higher Report similar speeds under most in-lab conditions, with the exception of Test design, we conduct a series of controlled, in-lab experiments under aĬomprehensive set of network conditions and usage modes (e.g., TCP congestionĬontrol, native vs. When and to what extent these two speed tests yield different results, as wellĪs the factors that contribute to the differences.
NDT), both in controlled and wide-area settings. In this paper, we present theįirst-ever comparative evaluation of Ookla and NDT7 (the latest version of Infrastructure used to perform measurements. Significant differences in both the test design and implementation, and in the Prevalent speed tests, Ookla's Speedtest and Measurement Lab's Networkĭiagnostic Test (NDT), are often used for similar purposes, despite having Network performance, both in single-user settings and in aggregate. Download a PDF of the paper titled A Comparative Analysis of Ookla Speedtest and Measurement Labs Network Diagnostic Test (NDT7), by Kyle MacMillan and 4 other authors Download PDF Abstract: Consumers, regulators, and ISPs all use client-based "speed tests" to measure
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