Kyle MacMillan

In an effort to expand Internet access, local and federal policymakers have sought to use speed test data to determine where to allocate funding.

Consumers, regulators, and internet service providers (ISPs) all use client-based "speed tests" to measure network performance, both in single-user settings and in aggregate. Two prevalent speed tests, Ookla's Speedtest and Measurement Lab's Network Diagnostic Test (NDT), are often used for similar purposes, despite having significant differences in both the test design and implementation and in the infrastructure used to conduct measurements. This paper presents a comparative evaluation of Ookla and NDT7 (the latest version of NDT), both in controlled and wide-area settings.