It's a wrapper around https://github.com/rstudio/httpuv https://github.com/rstudio/httpuv I'm pretty sure it's blocking though, R doesn't really have good conc

It's a wrapper around https://github.com/rstudio/httpuv https://github.com/rstudio/httpuv I'm pretty sure it's blocking though, R doesn't really have good concurrency primitives. However, you can launch multiple R processes behind nginx and be able to serve N requests concurrently. Running this in an autoscaling group on AWS provides enough resilience in practice