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Michelle Vu | Web Performance Engineer;Fighting regressions has been a priority at Pinterest for many years. In part one of this article series, we provided an overview of the performance program at Pinterest. In this second part, we discuss how we monitor and investigate regressions in our Pinner Wait Time and Core Web Vital metrics for desktop and mobile web using real time metrics from real users. These real time graphs have been invaluable for regression alerting and root cause analysis.Real...