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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;
number_of_native_contexts: number;
number_of_detached_contexts: number;
}
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;
}
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