chore(vitest-runner): use more complex bench

Author: adriencaccia

packages/vitest-runner/benches/parsePr.bench.ts

@@ -0,0 +1,28 @@
+import { bench, describe } from "vitest";
+import parsePr from "./parsePr";
+
+// concatenate programatically generated string of 1000 characters
+const LONG_BODY =
+  new Array(1_000)
+    .fill(
+      "Lorem ipsum dolor sit amet consectetur adipisicing elit. Sunt, earum. Atque architecto vero veniam est tempora fugiat sint quo praesentium quia. Autem, veritatis omnis beatae iste delectus recusandae animi non."
+    )
+    .join("\n") + "fixes #123";
+
+describe("parsePr", () => {
+  bench("short body", () => {
+    parsePr({
+      body: "fixes #123",
+      title: "test",
+      number: 124,
+    });
+  });
+
+  bench("long body", () => {
+    parsePr({
+      body: LONG_BODY,
+      title: "test",
+      number: 124,
+    });
+  });
+});

packages/vitest-runner/benches/parsePr.ts

@@ -0,0 +1,75 @@
+interface PullRequest {
+  number: number;
+  title: string;
+  body: string;
+}
+
+function sendEvent(numberOfOperations: number): void {
+  for (let i = 0; i < numberOfOperations; i++) {
+    let a = i;
+    a = a + 1;
+  }
+}
+
+function logMetrics(
+  numberOfOperations: number,
+  numberOfDeepOperations: number
+): void {
+  for (let i = 0; i < numberOfOperations; i++) {
+    for (let i = 0; i < numberOfOperations; i++) {
+      let a = i;
+      a = a + 1;
+      a = a + 1;
+    }
+    sendEvent(numberOfDeepOperations);
+  }
+}
+
+function parseTitle(title: string): void {
+  logMetrics(10, 10);
+  modifyTitle(title);
+}
+
+function modifyTitle(title: string): void {
+  for (let i = 0; i < 100; i++) {
+    let a = i;
+    a = a + 1 + title.length;
+  }
+}
+
+function prepareParsingBody(body: string): void {
+  for (let i = 0; i < 100; i++) {
+    let a = i;
+    a = a + 1;
+  }
+  parseBody(body);
+}
+
+function parseBody(body: string): void {
+  logMetrics(10, 10);
+  for (let i = 0; i < 200; i++) {
+    let a = i;
+    a = a + 1;
+  }
+  parseIssueFixed(body);
+}
+
+function parseIssueFixed(body: string): number | null {
+  const prefix = "fixes #";
+  const index = body.indexOf(prefix);
+  if (index === -1) {
+    return null;
+  }
+
+  const start = index + prefix.length;
+  let end = start;
+  while (end < body.length && /\d/.test(body[end])) {
+    end += 1;
+  }
+  return parseInt(body.slice(start, end));
+}
+
+export default function parsePr(pullRequest: PullRequest): void {
+  parseTitle(pullRequest.title);
+  prepareParsingBody(pullRequest.body);
+}