  We present Trixi.jl, a Julia package for adaptive high-order numerical
simulations of hyperbolic partial differential equations. Utilizing Julia's
strengths, Trixi.jl is extensible, easy to use, and fast. We describe the main
design choices that enable these features and compare Trixi.jl with a mature
open source Fortran code that uses the same numerical methods. We conclude with
an assessment of Julia for simulation-focused scientific computing, an area
that is still dominated by traditional high-performance computing languages
such as C, C++, and Fortran.
