[klibertp]

Seconded. I recently evaluated quite a few Scheme implementations for a very simple web scraping project and found Chicken to be both fast and great with its packages. chicken-install feels almost like pip or npm and it works really well. The packages are many and most of them are nicely documented. If you need a Scheme with compile-to-C capability and a bunch of batteries included then Chicken Scheme is the way to go.