Rejected

Ideas we decided against. One page per idea with the rationale — check here (and deferred) before proposing an idea; never re-argue a decided one.

• Pure-JS exec engine — a just-bash-style interpreter as the execution engine.
• Materialize node_modules — copy the sandbox install onto host disk; can't beat a native install by filesystem physics.
• CI wall-time gate — hard-fail CI on a wall-clock benchmark regression; shared runners are too noisy.
• Warm daemon — a resident sandbox process between invocations.
• Rust/napi orchestrator — rewrite virrun's own orchestration in Rust for speed.
• In-process async vfs runs — drain a controlled event loop instead of bailing to native on async results.
• Hardlink/CAS flush — hardlink the write-back flush instead of byte-copying.