@henryiii I guess it is worth pointing out that in case you installed the build with the virtualenv backend/extra the performance benefit is likely more around half a second.
@hugovk@pillow Nice, the savings is a constant, so the effect is fractionally largest if you have a small package (pure Python plus hatchling or other simple backend). It basically skips installing pip in the temporary env, and pip is large/slow to install and has to be installed twice (since there are two envs). We might provide backend options in the future, allowing something like uv to be used. ;) But this was a good first step!
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