Performance tuning tips

Enable memory indicator

To determine whether performance issues are caused by low heap memory, enable the memory indicator:

• Right-click the status bar and select Memory Indicator.

The memory indicator will appear in the bottom-right corner:

Increase memory heap

1. Select Help | Change Memory Settings from the main menu.

2. In the dialog that opens, set a higher memory heap value in the Maximum Heap Size field.

3. Click Save and Restart.

Adjust -Xmx

To increase the memory heap, you can change the -Xmx option, which sets the maximum heap size for the JVM:

1. In the main menu, go to Help | Edit Custom VM Options. This action creates a copy of the .vmoptions file in the IDE configuration directory and opens it in the editor.

2. Update the -Xmx value. For example, use -Xmx4096m to allocate 4 GB of memory instead of the default 2 GB.

3. Restart RubyMine to apply the changes.

   

Enable Power Save mode

You can enable Power Save Mode or battery efficiency mode using one of the following options:

• As an alternative to disabling individual checks or files one by one, try using Power Save Mode. This mode disables all inspections and other resource-intensive background tasks across the entire IDE.

  To enable Power Save Mode, go to File | Power Save Mode.

  

• Right-click the status bar and select Power Save Mode. The Power Save Mode icon will appear on the status bar.

Edit files without indexing (LightEdit)

If you only need to view or make a quick change in a file, use LightEdit mode.

LightEdit mode provides a lightweight editor with syntax highlighting and basic features, which is ideal for quick edits without the overhead of project indexing. Find more details in LightEdit mode.

Identify what slows down indexing

Use the built-in diagnostic tools to see which activities and indexers consume the most resources during indexing.

1. Go to Help | Diagnostic Tools | Open Indexing Diagnostics to review a detailed report of the indexing process.

   

   The report includes a list of indexing activities, their CPU usage, and duration.

2. After identifying the heaviest contributors, consider narrowing your project scope, excluding generated or vendor directories, and disabling unnecessary language/framework plugins to reduce indexing load. Find more details in the procedures below.

Exclude directories and file types

• Your project may include folders with binaries, logs, or build artifacts that do not affect RubyMine code insight. Indexing such folders can also be resource-intensive due to their size or location. In these cases, it is reasonable to exclude the folders manually: right-click the directory in the project tree and select Mark Directory as | Excluded.

  Once files are excluded, their symbols are no longer available to RubyMine. The following features will be disabled for excluded files: code completion, auto-import, code generation, Find in Files (except in open files), navigation, and refactoring.

• You can also exclude files such as logs or generated data by file type.

  1. Go to Settings | Editor | File Types and switch to the Ignored Files and Folders tab.

  2. Add a new extension () to the list of ignored file types:

     

  3. Apply the changes and close the dialog.

Collect RubyMine logs

1. In the main menu, go to Help | Collect Logs and Diagnostic Data.

2. You may be asked to confirm the action in the Sensitive Data dialog by clicking Show in Finder.