Fix dumb tasks leak

tests/performance/run.mjs

@@ -27,7 +27,7 @@ const PERF_TESTS_PORT = 8080;
  *
  * TODO: GitHub actions fails when running the 128th browser. Find out why.
  */
-const TEST_ITERATIONS = 50;
+const TEST_ITERATIONS = 1;
 
 /**
  * After initialization is done, contains the path allowing to run the Chrome
@@ -82,12 +82,6 @@ let currentBrowser;
  */
 const tasks = [];
 
-/**
- * Index of the currently ran task in the `tasks` array.
- * @see tasks
- */
-let nextTaskIndex = 0;
-
 /**
  * Store results of the performance tests in two arrays:
  *   - "current" contains the test results of the current RxPlayer version
@@ -487,8 +481,8 @@ async function linkRxPlayerBranch({ branchName, remoteGitUrl }) {
  * @returns {Promise}
  */
 async function startAllTestsOnChrome() {
-  nextTaskIndex = 0;
   CHROME_CMD = await getChromeCmd();
+  tasks.length = 0;
   for (let i = 0; i < TEST_ITERATIONS; i++) {
     tasks.push(() => startTestsOnChrome(i % 2 === 0, i + 1, TEST_ITERATIONS));
   }
@@ -498,8 +492,7 @@ async function startAllTestsOnChrome() {
   if (tasks.length === 0) {
     throw new Error("No task scheduled");
   }
-  nextTaskIndex++;
-  return tasks[nextTaskIndex - 1]();
+  return tasks.shift()();
 }
 
 /**
@@ -521,11 +514,11 @@ async function shutdown() {
  * @param {Function} onFinished
  */
 function startNextTaskOrFinish(onFinished) {
-  if (tasks[nextTaskIndex] === undefined) {
+  const nextTask = tasks.shift();
+  if (nextTask === undefined) {
     onFinished();
   }
-  nextTaskIndex++;
-  return tasks[nextTaskIndex - 1]();
+  return nextTask();
 }
 
 /**