What we're doing to make Quarto fast(er)
summary
Quarto spends about one third of time in TypeScript and two thirds in Pandoc; rendering 400 docs for the website takes 4 minutes 45 seconds (about 30% faster than 1.6) and raw input reading still costs roughly 20% of total time. The team is replacing Pandoc’s front end with a Rust front end delivered as a standalone library/binary that compiles to WebAssembly, yields 100x speed on parse-and-diagnose workloads, produces improved error diagnostics, and unlocks parallel and incremental rendering for Quarto 1.9 (early 2026).
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