Avoiding the Trailing Slash Tax on Github Pages and Astro

A trailing slash in URLs can significantly impact page load performance on GitHub Pages. Missing trailing slashes trigger 301 redirects, adding 14-60ms overhead per request and causing visual artifacts like font flickering. The solution involves creating a helper function to ensure all generated links include trailing slashes and implementing automated tests to catch hardcoded links without them. While GitHub Pages' server configuration can't be changed, preventing redirects at the source by consistently using trailing slashes eliminates the performance penalty and improves perceived site speed.