mirror of https://github.com/denoland/deno.git
80 lines
2.5 KiB
TypeScript
80 lines
2.5 KiB
TypeScript
// Benchmark measures time it takes to send a message to a group of workers one
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// at a time and wait for a response from all of them. Just a general
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// throughput and consistency benchmark.
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const data = "HTTP/1.1 200 OK\r\nContent-Length: 12\r\n\r\nHello World\n";
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const workerCount = 4;
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const cmdsPerWorker = 400;
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export interface ResolvableMethods<T> {
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resolve: (value?: T | PromiseLike<T>) => void;
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// eslint-disable-next-line @typescript-eslint/no-explicit-any
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reject: (reason?: any) => void;
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}
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export type Resolvable<T> = Promise<T> & ResolvableMethods<T>;
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export function createResolvable<T>(): Resolvable<T> {
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let methods: ResolvableMethods<T>;
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const promise = new Promise<T>(
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(resolve, reject): void => {
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methods = { resolve, reject };
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}
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);
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// TypeScript doesn't know that the Promise callback occurs synchronously
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// therefore use of not null assertion (`!`)
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return Object.assign(promise, methods!) as Resolvable<T>;
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}
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function handleAsyncMsgFromWorker(
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promiseTable: Map<number, Resolvable<string>>,
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msg: { cmdId: number; data: string }
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): void {
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const promise = promiseTable.get(msg.cmdId);
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if (promise === null) {
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throw new Error(`Failed to find promise: cmdId: ${msg.cmdId}, msg: ${msg}`);
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}
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promise.resolve(data);
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}
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async function main(): Promise<void> {
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const workers: Array<[Map<number, Resolvable<string>>, Worker]> = [];
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for (let i = 1; i <= workerCount; ++i) {
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const worker = new Worker("./subdir/bench_worker.ts");
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const promise = new Promise(
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(resolve): void => {
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worker.onmessage = (e): void => {
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if (e.data.cmdId === 0) resolve();
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};
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}
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);
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worker.postMessage({ cmdId: 0, action: 2 });
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await promise;
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workers.push([new Map(), worker]);
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}
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// assign callback function
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for (const [promiseTable, worker] of workers) {
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worker.onmessage = (e): void => {
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handleAsyncMsgFromWorker(promiseTable, e.data);
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};
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}
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for (const cmdId of Array(cmdsPerWorker).keys()) {
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const promises: Array<Promise<string>> = [];
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for (const [promiseTable, worker] of workers) {
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const promise = createResolvable<string>();
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promiseTable.set(cmdId, promise);
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worker.postMessage({ cmdId: cmdId, action: 1, data });
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promises.push(promise);
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}
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for (const promise of promises) {
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await promise;
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}
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}
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for (const [, worker] of workers) {
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worker.postMessage({ action: 3 });
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await worker.closed; // Required to avoid a cmdId not in table error.
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}
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console.log("Finished!");
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}
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main();
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