Chroma emits a span per token, so whole-file renders built DOMs nobody asked for: 198KB of build.c became 40,083 nodes and 137ms of parse. Lexing still starts at byte zero — a window opening inside a block comment cannot colour itself — but the iterator stops at the window's last line, so the tail is never tokenised. 103ms to 2.7ms for a first screen. Scroll fetches the next window; no-script gets a link. check-in: c517ec9464 user: quarry tags: trunk