Increase JavaScript Heap size in create-react-app project

Node features the way to increase the heap size via passing in the --max-old-space-size command line flag. In create-react-app projects everything depends on the use of react-scripts. How can I pass in this parameter in such projects and where should I best do that?

Thank you for help.



Thanks a lot to @dan-abramov as his comment is the answer! (Give him the vote up in case you come across this).

You can just put e.g. node --max_old_space_size=4096 node_modules/.bin/react-scripts start in there instead of react-scripts start

"build": "react-scripts --max_old_space_size=4096 build"

This should work


One line answer, run on terminal -> export NODE_OPTIONS=--max_old_space_size=4096


You can disable generation of source maps as described in

Indeed as per the documentation:

When set to false, source maps are not generated for a production build. This solves out of memory (OOM) issues on some smaller machines.

Which is the case when you got an Heap Out Of Memory error

To do so, create a .env file and add GENERATE_SOURCEMAP=false


Recent Questions

Top Questions

Home Tags Terms of Service Privacy Policy DMCA Contact Us

©2020 All rights reserved.