Remove the ignore-heap-size comment to enable the memory measurement. - [x] `./mach build -d` does not report any errors - [x] `./mach test-tidy` does not report any errors - [x] These changes fix #6909 - [x] These changes do not require tests because they just enabled memory measurement @jdm the build fails, and I'm not so sure why. Assistance please? 😄 Source-Repo: https://github.com/servo/servo Source-Revision: 36222cf543731af71b22d5fb8e3f17c6c51af895