I had a situation recently where I saved a bunch of time on resolution during install of Python packages by breaking it up into smaller groups of packages to install in separate steps. We have some packages in a private devpi server and some dependencies that can come from any pypi mirror. By forcing the private packages to be in their own install step it drastically cut down the time to resolve and start downloading packages. Does anyone know of comparisons of resolution metrics? I spent several hours of my week waiting on Python packages installation and would love to improve the situation.

On a related note: our NPM install times are even worse: any tips to help there would be welcome.