WebStorm 2023.3 Help

How to improve WebStorm performance

In this section, you’ll find some tips on how to make WebStorm run faster. They will be especially helpful if you’re working on large projects. If you’ve given these tips a try, but WebStorm is still slow, please report a performance problem as described below.

Increase memory heap

If you’re working on a large project, your IDE might start to run slowly. One of the first things you can try to do to fix this is to increase the memory heap size in WebStorm.

Increase memory heap via IDE

  1. Press Shift twice and search memory to get to the Memory Settings dialog, where you can adjust the limit. Make sure not to overdo it – 4 GB should be enough.

  2. Restart the IDE after you have made the changes.

    Increase memory heap from WebStorm

Increase memory heap via Toolbox App

You can also change the memory heap size using the Toolbox App.

  1. Open the app, click the three dots next to your WebStorm installation, and select Settings.

    Increase memory heap from Toolbox app: open settings
  2. Go to the Configuration section and set a new value in the Maximum heap size field as shown below. Most of the time, setting it to 4 GB should be enough.

    Increase memory heap from Toolbox app: configuration
  3. Restart the IDE once you make the changes.

Bonus tip: Turn on memory indicator

You can check whether performance slowdowns are caused by low heap memory by enabling the memory indicator.

  • Right-click the bottom-right corner of the WebStorm status bar and select Memory Indicator from the list there.

    Enable memory indicator

Speed up indexing

Indexing is what makes WebStorm smart. It is responsible for all of its core features, such as code completion, code quality analysis, navigation, syntax highlighting, and refactorings. If you work with large files or projects, WebStorm’s indexing might become sluggish. Here’s what you can do to help speed it up.

Exclude directories and files

If you exclude a file or a folder, it will remain a part of a project, but WebStorm will no longer index it. Look through your project and see if there is anything you could exclude from indexing. We recommend looking for any dynamically generated files, such as compilation output folders, and excluding them.

  • To exclude a file, right-click it in the Project tool window and select Override File Type | Plain text. Plain text files are marked with the Plain text icon.

  • To exclude a folder, right-click it in the Project tool window and select Mark Directory as | Excluded. Excluded folders are marked with the Excluded root icon.

Use shared indexes

All JetBrains IDEs, including WebStorm, come bundled with the Shared Project Indexes plugin. Its main goal is to reduce the overall indexing time and CPU usage of your IDE, so please make sure it is enabled on the Installed tab of the Settings | Plugins.

Change highlighting level for a file

By default, WebStorm analyzes your code as you type and highlights all problems found in the current file. If your file is large, this might make WebStorm a bit laggy. In this case, you can temporarily change the highlighting level from All Problems to Syntax or None. Don’t forget to turn it back on once you’re done to avoid missing any important problems!

Change highlighting level

For more information, refer to Change the highlighting level for a file.

Disable features you don’t need

There are quite a few tips on the internet suggesting what features you could turn off to improve WebStorm performance. Although some of these things can really help, we would kindly ask you to be careful with this step. It is possible to accidentally disable some essential features that will make your experience working with WebStorm worse.

Here are several things you can safely try disabling.

Code Vision

Code Vision shows additional information about your code, making it easier to track the usage of various classes, methods, type aliases, and interfaces. This feature can be quite resource-hungry in large projects. You can try turning it off in Settings | Editor | Inlay Hints > Code vision.

Disable Code Vision

As an option, you can also disable other inlay hints to see whether it improves WebStorm performance.

Unused global symbol inspection

Like Code Vision, this feature can also affect WebStorm performance. You can go to Settings | Editor | Inspections, look for the Unused global symbol inspection there, and try to turn it off.

Unused global symbol inspection

Bundled plugins you don’t need

WebStorm includes pre-installed plugins that provide support for many different technologies. These plugins support technologies that the majority of our users need, but plugins providing support that you don’t need can be disabled.

  1. Open the Settings dialog (Control+Alt+S) and go to Plugins.

  2. Switch to the Installed tab to review the list of plugins you have installed in WebStorm.

  3. If you want to go over the bundled plugins specifically, you can also use the Bundled filter by clicking on the three-dot kebab icon.

    Disable unnecessary plugins

Live Templates for some technologies

WebStorm comes packed with code snippets, or Live Templates as we call them, that you can quickly add code fragments you use often. You can disable any Live Templates for technologies you are not using under Settings | Editor | Live Templates.

Disable live templates


If you don’t work with Emmet a lot, you can disable it in WebStorm, too. For this, go to Settings | Editor | Emmet.

Disable Emmet

Report performance problems

If the tips above didn’t help, please report your performance problem to our issue tracker. To investigate it, we’ll need you to provide the WebStorm logs and a CPU usage snapshot.

You can find the WebStorm logs under Help | Collect Logs and Diagnostic Data in the main menu.

To collect a CPU usage snapshot

  1. In the main menu, go to Help | Diagnostic Tools | Start CPU Usage Profiling.

  2. Reproduce the problem you’ve experienced.

  3. Go back to the main menu and select Help | Diagnostic Tools | Stop CPU Usage Profiling.

  4. Collect the captured snapshot and share it with us along with your zipped log folder.

    If the snapshot is too large to attach to the issue, please upload it here or use another file upload service.

Last modified: 05 September 2023