mkdir -p ~/src/chromium-deb
cd ~/src/chromium-deb
apt-get source chromium
sudo apt-get build-dep chromium
time dpkg-buildpackage -rfakeroot -uc -b -j4 # DEB_BUILD_OPTIONS=nostrip
28439,94s user 6571,60s system 280% cpu 3:28:10,43 total
du -sh ~/src/chromium-deb
12G
compiling take an average of 2G RAM or less but the final link is critical 3.5G+