There are a considerable number of different terms covering web performance and performance load testing. The glossary provides a single reference point for as many as we can identify.
Accelerated Mobile Pages
Accelerated Mobile Pages (AMP) is an industry-led open source initiative to deliver web pages to mobile-connected devices faster.
Data Start Time
Data start time | an important web performance calculated from metric timing points made available through the W3C's Navigation Timing API
Synthetic Monitoring | regularly monitors a website or other online service regularly, with a view to reporting on performance and availability