Comparing performance snapshots
You can compare two arbitrary snapshots that contain recorded CPU information, obtained with sampling or tracing.
To compare snapshots, do the following:
- Open the snapshots you want to compare.
- Select one of them.
-
Use
File | Compare Snapshot with...(the action is also available from the popup menu) and select a snapshot to compare with.
The tab with "Comparison" view opens. It contains the following CPU views:
-
"Call tree" and "Method list" with 3 columns:
Time Diff (ms), Old Time (ms), and New Time (ms),
which display differences in method execution times.
- If both snapshots contain invocation counts (i.e. results were gathered in Tracing mode) the views will have additional columns displaying the difference in method invocation counts.