You can run your link command with `EMPROFILE=2` set in the environment and
emscripten will print a breakdown of the various link steps.
If you want even more details you can use `EMPROFILE=1` to produce a trace
that can be rendered as html.
See https://emscripten.org/docs/optimizing/Profiling-To
During the Reelase build process, compilation is quick but optimization
takes a long time. But Debug type is fast.
How can I identify which parts are taking the most time during optimization?
* emcmake cmake -S ../ -DCMAKE_BUILD_TYPE=Release
* build time : 30minutes more...
* cmakelist build li
