The performance vignette is precompiled because it runs benchmarks up to
n = 50,000 which takes several minutes.

To refresh it after code changes:

  Rscript vignettes/precompile.R

This knits performance.Rmd.orig into performance.Rmd (with embedded output)
and regenerates the performance-*.png figures.

The other vignettes (guide, crossfitting, augmented) are standard Rmd files
that R CMD build compiles directly.

To rebuild the pkgdown website:

  Rscript -e 'pkgdown::build_site()'
