mirror of
https://github.com/vercel-labs/scriptc.git
synced 2026-11-08 08:44:37 +08:00
Chris Tate
f0f91ac1ff
Without @types/node, every program loaded scriptc-node-fallback.d.ts whole: the console and process globals and 47 Node modules, about 8,100 lines, parsed, bound and checked in every cold build whether or not the program imported them. - The fallback file keeps the globals and the modules they name (console, readline, readline/promises, perf_hooks, tty). Every other module, under both spellings, has its own file in ambient/node-fallback/, which references the files of the modules its declarations name. - A module's file joins the program when one of the program's files names the module in a string literal: imports, requires, import types and JSDoc types all name modules that way. The entry is read before the first program; the program-root discovery passes add modules that other files name. Files are read as tsgo reads them, and the TypeScript libraries and scriptc's own declarations are skipped. - The checks that recognized the fallback file by its path recognize every fallback file.
44 lines
1.8 KiB
TypeScript
44 lines
1.8 KiB
TypeScript
/* node:v8 — importable for the packages that require it at top level.
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* getHeapStatistics answers allocator-derived figures in Node's shape
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* (approximate: the runtime heap's total and used bytes, the machine's
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* memory as the limit; V8-only figures are 0). The other members observe
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* V8 itself and fence at their use with the by-design reason; they are
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* declared so programs that type-check under their own tsc reach that
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* fence. */
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declare module "v8" {
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type DoesZapCodeSpaceFlag = 0 | 1;
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export interface HeapInfo {
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total_heap_size: number;
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total_heap_size_executable: number;
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total_physical_size: number;
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total_available_size: number;
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used_heap_size: number;
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heap_size_limit: number;
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malloced_memory: number;
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peak_malloced_memory: number;
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does_zap_garbage: DoesZapCodeSpaceFlag;
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number_of_native_contexts: number;
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number_of_detached_contexts: number;
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total_global_handles_size: number;
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used_global_handles_size: number;
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external_memory: number;
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}
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export function getHeapStatistics(): HeapInfo;
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export function cachedDataVersionTag(): number;
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export function getHeapSpaceStatistics(): unknown[];
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export function getHeapCodeStatistics(): unknown;
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export function getHeapSnapshot(options?: unknown): unknown;
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export function writeHeapSnapshot(fileName?: string, options?: unknown): string;
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export function setFlagsFromString(flags: string): void;
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export function setHeapSnapshotNearHeapLimit(limit: number): void;
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export function serialize(value: unknown): Buffer;
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export function deserialize(buffer: Uint8Array): unknown;
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export function takeCoverage(): void;
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export function stopCoverage(): void;
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export function isStringOneByteRepresentation(content: string): boolean;
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}
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declare module "node:v8" {
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export * from "v8";
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}
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