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What is Asynchronous?

  1. Asynchronous code is better for performance.

  2. Asynchronous code is hard to understand.

  3. Asynchronous is not Blocking in nature.

  4. Hardware is non-blocking in nature.

📋 Table of Contents​

Asynchronous Pattern​

  1. callback

  2. promises

  3. async/await

  4. Generators

Asynchronous vs Synchronous Programming​

  • Synchronous code runs one step at a time and blocks subsequent execution.
  • Asynchronous code starts work and continues, handling results later.

Event Loop, Call Stack & Heap​

  • Call Stack executes synchronous function frames.
  • Heap stores runtime objects and data.
  • Event Loop pushes callbacks when the stack is available.

Parallelism vs Asynchronous Programming​

  • Asynchronous programming is non-blocking flow management.
  • Parallelism is true simultaneous execution across multiple cores/threads.
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