| declare module "v8" { |
| import { Readable } from "stream"; |
| |
| interface HeapSpaceInfo { |
| space_name: string; |
| space_size: number; |
| space_used_size: number; |
| space_available_size: number; |
| physical_space_size: number; |
| } |
| |
| // ** Signifies if the --zap_code_space option is enabled or not. 1 == enabled, 0 == disabled. */ |
| type DoesZapCodeSpaceFlag = 0 | 1; |
| |
| interface HeapInfo { |
| total_heap_size: number; |
| total_heap_size_executable: number; |
| total_physical_size: number; |
| total_available_size: number; |
| used_heap_size: number; |
| heap_size_limit: number; |
| malloced_memory: number; |
| peak_malloced_memory: number; |
| does_zap_garbage: DoesZapCodeSpaceFlag; |
| } |
| |
| function getHeapStatistics(): HeapInfo; |
| function getHeapSpaceStatistics(): HeapSpaceInfo[]; |
| function setFlagsFromString(flags: string): void; |
| /** |
| * Generates a snapshot of the current V8 heap and returns a Readable |
| * Stream that may be used to read the JSON serialized representation. |
| * This conversation was marked as resolved by joyeecheung |
| * This JSON stream format is intended to be used with tools such as |
| * Chrome DevTools. The JSON schema is undocumented and specific to the |
| * V8 engine, and may change from one version of V8 to the next. |
| */ |
| function getHeapSnapshot(): Readable; |
| |
| /** |
| * |
| * @param fileName The file path where the V8 heap snapshot is to be |
| * saved. If not specified, a file name with the pattern |
| * `'Heap-${yyyymmdd}-${hhmmss}-${pid}-${thread_id}.heapsnapshot'` will be |
| * generated, where `{pid}` will be the PID of the Node.js process, |
| * `{thread_id}` will be `0` when `writeHeapSnapshot()` is called from |
| * the main Node.js thread or the id of a worker thread. |
| */ |
| function writeHeapSnapshot(fileName?: string): string; |
| } |