The native compiler ran four large module initializers at every startup:
the builtin call signatures (LIB_FN_SIGS), the Node 24 fetch
compatibility profile, and the builtin module function and ambient
surface tables. Together their init functions are about 1.3 MB of code,
and --version and warm cache-hit builds paged them in and built the
tables without reading them.
Each table is now built by a function on its first call and kept in a
module variable:
- libFnSignatures() replaces LIB_FN_SIGS
- node24FetchCompatProfile() and staticFetchMembers() replace
NODE24_FETCH_COMPAT_PROFILE and the STATIC_* member sets
- builtinModuleFns() and ambientSurfaceFns() replace BUILTIN_MODULE_FNS
and AMBIENT_SURFACE_FNS
The @scriptc/compiler entry point keeps LIB_FN_SIGS and
NODE24_FETCH_COMPAT_PROFILE as deprecated constants built from the new
functions when the entry module loads. The native compiler does not load
that module.
The surface manifest's coverage notes read the fetch target through the
profile function, so building the manifest module no longer builds the
profile. The table contents are unchanged.
- Split builtin lowering into focused API owners and keep module dispatch separate.
- Share byte conversion, receiver checks, and filesystem option parsing; remove redundant forwarding and clarify names.
- Preserve compiler output and diagnostics, with import boundaries enforced by the code-quality checks.
- Separate function signatures, argument completion, specialization, and body construction from call dispatch.
- Share generic binding checks, argument prologues, return completion, and native input validation.
- Enforce direct implementation imports while preserving existing ABI and diagnostic behavior.
- Derive builtin call names from shared signatures and keep call semantics with their ABI contracts.
- Separate runtime dependency detection, exception metadata, and library policy from the core IR while preserving existing exports.
- Enforce the frontend signature boundary and validate native compilation and policy behavior.
- Enforce oxlint and oxfmt for owned JavaScript and TypeScript with independent CI checks.
- Preserve compiler import boundaries and protected fixtures while cleaning up lint findings.
- Standardize source formatting and validate import, fixture, and embedded-source protections.
Chris Tate