Profiling-IntelliJ-Perf-Issues.md

For information about how to profile IntelliJ for performance issues, see https://intellij-support.jetbrains.com/hc/en-us/articles/207241235-Reporting-performance-problems#capture_slow_startup_2019_2.

In summary:

• install the 'Performance Testing' plugin
• restart IntelliJ
• get set up to repro the issue
• from the Help > Diagnostics menu, select Start CPU Usage Profiling
• repro the issue
• from the Help > Diagnostics menu, select Stop CPU Usage Profiling
• this will save a zip file with a performance snapshot

You can them attach that zip file to bug reports, or open it yourself in JetBrains' YourKit Java Profiler tool.