Node.js · Theory

Worker.isMainThread Property

← All stacks

Theory

239/723

Worker.isMainThread Property

Priya only reaches for Worker.isMainThread Property when use all CPU cores has to stay correct in production box.

Worker.isMainThread Property order — meaning → cluster.fork or PM2 → one limit. Dumping ten features helps nobody.

Skip Worker.isMainThread Property and in-memory session without sticky shows up in production box.

Priya ships Worker.isMainThread Property in production box. That is the use case worth saying.

If use all CPU cores breaks under Worker.isMainThread Property, check in-memory session without sticky first.

After Worker.isMainThread Property, Priya should still remember in-memory session without sticky.

Close Worker.isMainThread Property with: “If I skip it, use all CPU cores goes wrong like this: in-memory session without sticky.”

Exam tip

For Worker.isMainThread Property: definition + production box + one failure.

Example

// Worker.isMainThread Property
const users = [
  { id: 1, name: "Asha" },
  { id: 2, name: "Ravi" },
];

function findUser(id) {
  return users.find((u) => u.id === id) ?? null;
}

console.log(findUser(2));
console.log(users.map((u) => u.name));

Worker.isMainThread Property: find user 2, then list names. Say both prints.

Short notes

DefWorker.isMainThread Property — Priya uses it for use all CPU cores in production box.
RuleWorker.isMainThread Property → cluster.fork or PM2.
RememberWorker.isMainThread Property + npm (production box).
UseWorker.isMainThread Property in production box (use all CPU cores).
TrapWorker.isMainThread Property — in-memory session without sticky.
ExWorker.isMainThread Property → use all CPU cores.

// Worker.isMainThread Property const users = [ { id: 1, name: "Asha" }, { id: 2, name: "Ravi" }, ]; function findUser(id) { return users.find((u) => u.id === id) ?? null; } console.log(findUser(2)); console.log(users.map((u) => u.name));

Worker.isMainThread Property

Example

Short notes

Questions

Worker.isMainThread Property

Example

Short notes

Questions