Differential Flamegraphs in Java in Jeffrey Microscope

In the first article , we got started with Jeffrey Microscope and learned to read a single flamegraph — the timeseries, search, tooltips, and the allocation and wall-clock variants. This time we build directly on that foundation and tackle one of Jeffrey’s most powerful features for real-world performance work: the differential flamegraph , which compares two recordings and shows you precisely what changed between them. A single flamegraph tells you where your application spends its time.