You must have the Rust compiler installed in order to build this package from source. See extendr: Getting Started guide, with Step 1 being sufficient for building this package.
remotes::install_github("ku-awdc/curveLandscape")The underlying rust crate makes use of rayon, which means,
that this package will you use as many threads as available, or
adhere to the limit set by the environment variable RAYON_NUM_THREADS.
See rayon::num_threads
for more details.