Zise is a web application which gives you an idea of which module consume the most rom and ram in an executable. It takes as input the result of the following command line nm --line-numbers --print-size --portability path/to/exe.elf and display the result in a tree table inspired by WinDirStats. It requires the .elf file to be built with the debug symbols. You can do this with the -g option of gcc.
The website is a single page application deployed automatically as a github page. It does not send your data to a server to process it. You can run it locally without an internet access.
cd frontend
npm install && npm run dev