The General registry is the collection of open source packages that makes up the Julia package ecosystem. Here, we take a survey: what fraction of packages have tests? CI? Docs? An open source license? How big are most packages? What's the biggest one? Are there many tiny packages? We will explore these questions and more with charts, plots, and discussion. We'll also show how to use PackageAnalyzer.jl to collect the data for yourself or take a look at a particular package (perhaps your own!).

Julia has historically been built against a single backing BLAS/LAPACK library, and switching to a different library has required a recompilation of Julia. This was compounded by issues with loading 3rd party binaries that linked against incompatible BLAS backends. This talk will showcase a new low-overhead compatibility layer in Julia v1.7 named libblastrampoline that allows for runtime switching of BLAS/LAPACK libraries, as well as allowing loading of multiple BLAS/LAPACK ABIs at once.