You can check whether performance slowdowns are caused by low heap memory by enabling the memory indicator. Restart the IDE once you make the changes. Most of the time, setting it to 4 GB should be enough. Go to the Configuration section and set a new value in the Maximum heap size field as shown below.

Open the app, click the three dots next to your WebStorm installation, and select Settings. You can also change the memory heap size using the Toolbox App. Restart the IDE after you have made the changes. Make sure not to overdo it – 4 GB should be enough. Press Shift twice and search memory to get to the Memory Settings dialog, where you can adjust the limit. One of the first things you can try to do to fix this is to increase the memory heap size in WebStorm.

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

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