Why "Shift Left"?

Performance Engineering Experts

When you look at almost any depiction of a system or software development cycle, the flow starts at the left and moves through time to the right. Occasionally it’s shown top to bottom but generally it’s left to right. So when advice is given to address a concern earlier in the cycle, we move it to the left in the depiction, or shift it left. This is an idea most often mentioned with regard to security. It’s the premise of DevSecOps, a popular practice nowadays. But it applies just as much to performance, maybe even more so.