Compare Traces

You can compare traces to validate performance fixes or to detect newly introduced bottlenecks or performance degradations.

By default traces are compared using a differential flamegraph as a visualisation. The flamegraph of the base trace is shown but the color scheme signals how much faster (in blue) or slower (in red) the same span is in the target trace of the comparison.

When both traces contain callgraph data, then you can see they also compare both traces with a differential callgraph, showing the difference in time and memory consumption for every individual function.

Click the "Compare" button in the trace details and filter for another trace to perform the comparison against.