As application development and delivery (AD&D) teams speed up continuous delivery (CD), they find performance testing too late in the cycle often results in costly rework. Continuous testing is the new best practice for CD, and agile-plus-DevOps teams need to embrace shift left to make it happen. Functional testing has been shifting left; now it’s time to do the same with performance testing, adding it to continuous integration and continuous delivery (CI/CD) automation. This report outlines what shift-left performance testing (SLPT) is, why it matters, and how to do it.