bench: add 100-page and 500-page corpora

bench/urls-100.txt

@@ -0,0 +1,104 @@
+# Extended corpus: 100 public pages (2026-10-04), every URL answered HTTP 200
+# when checked, across docs, reference, news, encyclopaedia, government and
+# standards sites. Run with: go run ./cmd/compare -urls urls-100.txt
+# The ten-page urls.txt remains the quick check.
+https://arxiv.org/
+https://css-tricks.com/
+https://developer.chrome.com/
+https://developer.mozilla.org/en-US/docs/Glossary
+https://developer.mozilla.org/en-US/docs/Learn
+https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API
+https://developer.mozilla.org/en-US/docs/Web/Accessibility
+https://developer.mozilla.org/en-US/docs/Web/CSS
+https://developer.mozilla.org/en-US/docs/Web/CSS/flex
+https://developer.mozilla.org/en-US/docs/Web/CSS/grid
+https://developer.mozilla.org/en-US/docs/Web/HTML
+https://developer.mozilla.org/en-US/docs/Web/HTTP
+https://developer.mozilla.org/en-US/docs/Web/JavaScript
+https://developer.mozilla.org/en-US/docs/Web/SVG
+https://doc.rust-lang.org/book/
+https://docs.docker.com/
+https://docs.github.com/en
+https://docs.python.org/3/library/json.html
+https://docs.python.org/3/library/re.html
+https://docs.python.org/3/tutorial/index.html
+https://en.wikipedia.org/wiki/CSS
+https://en.wikipedia.org/wiki/Chromium_(web_browser)
+https://en.wikipedia.org/wiki/Compiler
+https://en.wikipedia.org/wiki/Cryptography
+https://en.wikipedia.org/wiki/Git
+https://en.wikipedia.org/wiki/HTML
+https://en.wikipedia.org/wiki/HTTP
+https://en.wikipedia.org/wiki/Hypertext_Transfer_Protocol
+https://en.wikipedia.org/wiki/Internet
+https://en.wikipedia.org/wiki/JavaScript
+https://en.wikipedia.org/wiki/JavaScript_engine
+https://en.wikipedia.org/wiki/Linux
+https://en.wikipedia.org/wiki/Markdown
+https://en.wikipedia.org/wiki/Mozilla_Firefox
+https://en.wikipedia.org/wiki/Open_source
+https://en.wikipedia.org/wiki/PNG
+https://en.wikipedia.org/wiki/Python_(programming_language)
+https://en.wikipedia.org/wiki/Rust_(programming_language)
+https://en.wikipedia.org/wiki/SVG
+https://en.wikipedia.org/wiki/Unicode
+https://en.wikipedia.org/wiki/Unix
+https://en.wikipedia.org/wiki/World_Wide_Web
+https://go.dev/blog/
+https://go.dev/blog/go1.22
+https://go.dev/blog/go1.23
+https://go.dev/doc/
+https://go.dev/doc/effective_go
+https://go.dev/doc/faq
+https://go.dev/doc/modules/managing-dependencies
+https://go.dev/doc/tutorial/getting-started
+https://go.dev/ref/spec
+https://httpd.apache.org/
+https://kubernetes.io/docs/home/
+https://lobste.rs/
+https://news.ycombinator.com/newest
+https://nginx.org/en/
+https://nodejs.org/en
+https://pkg.go.dev/bytes
+https://pkg.go.dev/context
+https://pkg.go.dev/crypto/tls
+https://pkg.go.dev/encoding/json
+https://pkg.go.dev/errors
+https://pkg.go.dev/fmt
+https://pkg.go.dev/go/ast
+https://pkg.go.dev/image
+https://pkg.go.dev/io
+https://pkg.go.dev/math
+https://pkg.go.dev/net/url
+https://pkg.go.dev/os
+https://pkg.go.dev/regexp
+https://pkg.go.dev/sort
+https://pkg.go.dev/strings
+https://pkg.go.dev/sync
+https://pkg.go.dev/time
+https://tools.ietf.org/
+https://web.dev/
+https://www.apache.org/
+https://www.bbc.com/news
+https://www.cia.gov/the-world-factbook/
+https://www.debian.org/
+https://www.eclipse.org/
+https://www.freebsd.org/
+https://www.gutenberg.org/
+https://www.ietf.org/
+https://www.kernel.org/
+https://www.kernel.org/doc/html/latest/
+https://www.khanacademy.org/
+https://www.nasa.gov/
+https://www.openbsd.org/
+https://www.opensource.org/
+https://www.pbs.org/
+https://www.postgresql.org/
+https://www.python.org/
+https://www.rfc-editor.org/
+https://www.rust-lang.org/
+https://www.smashingmagazine.com/
+https://www.sqlite.org/
+https://www.theguardian.com/international
+https://www.un.org/
+https://www.unicode.org/