![]() You can get the shallow size of an object instance using ClassLayout.parseClass(Foo.class).toPrintable() (optionally passing an instance to toPrintable). On Oracle JDK 1.8.0_40 running on 64-bit Windows (used for all following examples), this method returns Running 64-bit HotSpot VM.įield sizes by type: 4, 1, 1, 2, 2, 4, 4, 8, 8 Īrray element sizes: 4, 1, 1, 2, 2, 4, 4, 8, 8 To get the sizes of primitives, references and array elements, use VMSupport.vmDetails(). This makes JOL much more accurate than other tools relying on heap dumps, specification assumptions, etc. These tools are using Unsafe, JVMTI, and Serviceability Agent (SA) heavily to decoder the actual object layout, footprint, and references. JOL (Java Object Layout) is the tiny toolbox to analyze object layout schemes in JVMs. Execution of the script will be continued right after the action is triggered.You should use jol, a tool developed as part of the OpenJDK project. Note that in this case they don't have waiters. It's also possible to invoke actions using %action. Type text with the specified delay between key pressesĮach command will wait until the corresponding action is finished, so there is no need to insert an intermediate waiter. Reformat the whole project with the selected profile Wait till the progress manager has no progress indicator Start profiling using key as activity name Perform batch inspection on files with the specified extension using the currently selected profile (but without Spellchecking) It lets you submit a support request and open the CPU snapshot in file browser. The first script line is created automatically and points to the currently opened file in the editor.Īfter the CPU snapshot is captured, the Performance Summary dialog opens. The scripts allow us to control the sequence of actions that is performed during snapshots capturing and simplify reproducibility. The Performance Issue Reporter dialog contains predefined scripts for the common scenarios where IDE slow-downs can be detected, as well as lets you write your own scripts. The Execute Performance Script action provides a convenient way to collect CPU snapshots that help to identify the performance problem. Notice: on macOS, some performance script commands require the IDE to have the System Settings | Security & Privacy | Accessibility permissions This action will capture the CPU snapshot during the indexing phase on the next project opening. If you experience any issues with IDE indexing performance, enable Help | Diagnostic | Profile indexing and then invoke File | Invalidate caches and restart. The information is generalized, so any sensitive data won’t be revealed. To provide performance summary about your hardware, OS, current project, and the file, invoke Help | Settings Summary and select Performance Problem in the Issue Type list. Please use async profiler and change its options only when requested. To stop profiling invoke Help | Diagnostic | Stop Async Profiler. The option enables async profile (that may take a while) and start profiling right away. This avoids modification of the phpstorm.vmoptions file and doesn't increase system start time.Ģ018.3 release introduces Help | Diagnostic | Start Async Profiler option for Linux and macOS. The profile will be enabled only for the current IDE session until IDE restart. ![]() ![]() To enable YourKit CPU profiler in the IDE, invoke Help | Diagnostic | Enable CPU Profiler. ![]()
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