- System requirements
- Profiler architecture
- Running the profiler
- Profiler activation
- Start profiling
- Solving performance problems
- CPU profiling
- CPU usage estimation
- Sampling
- Asynchronous sampling
- Tracing
- Call counting
- CPU tab
- CPU usage telemetry
- Call tree - All threads merged
- Call tree - By thread
- Flame graph
- Hot spots
- Method list
- Java EE profiling results
- Callee list view
- Method merged callees view
- Method back traces view
- What-if: an ability to ignore particular methods or focus on particular methods only
- Comparing performance snapshots
- Sampling settings
- Tracing settings
- Threads
- Deadlock detector
- Memory profiling
- Garbage collection
- Monitor profiling
- Exception profiling
- Probes: monitor events of various kinds
- Performance Charts
- Inspections: automatic recognition of typical problems
- Automatically trigger actions on event
- Summary, snapshot annotation, automatic deobfuscation
- Time measurement (CPU time, wall time)
- Filters
- Snapshot directory customization
- Export of profiling results to HTML, CSV, XML, plain text
- Profiler Java API
- Profiler HTTP API
- Command line tool to control profiling
- Settings
- FAQ: How to profile in my scenario?
Hot spots
Hot spots shows methods that consumed the most time. The host spots list is similar to the method list sorted by time, but it excludes the methods which do not consume time itself. I.e if the time was consumed only in called methods, then the caller method is not a host spot. In other words the most important methods for application performance are shown.
Profiler shows hot spots in CPU tracing, sampling and asynchronous sampling modes. For call counting mode the list is not available, because call stacks are not collected.
The hot spots are calculated based on current filters. Every time you change filters, you get the new list of hot spots.
Actions
The following actions are available in the popup menu:
- CPU | Method Merged Callees (Ctrl+M) - shows the method's merged callees.
- CPU | Method Back Traces (Ctrl+Shift+M) - shows the method's back traces.
- Tools | Open in IDE (F7) - opens method declaration in IDE editor. See IDE integration.