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Nozibul Islam
Nozibul Islam

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Parallel Programming in Web Browsers

Parallel Programming in Web Browsers:

1. Basic Concept of Parallel Programming:

  • Performing multiple tasks simultaneously.
  • Example: Instead of one person doing a single task, many people work together to complete multiple tasks at the same time.

2. Example of Parallel Programming in the Browser:

const worker1 = new Worker('worker1.js');
const worker2 = new Worker('worker2.js');

// One worker is processing an image
worker1.postMessage({task: 'processImage'});

// Another worker is calculating data
worker2.postMessage({task: 'calculateData'});
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3. Benefits:

  • Prevents browser from hanging.
  • Ensures the website runs smoothly.
  • Tasks complete faster.

4. Real-Life Example: Similar to tasks in a kitchen:

  • One person is chopping vegetables.
  • Another person is cleaning fish.
  • Another is washing rice.
  • All tasks are happening simultaneously.

5. When Needed in Browsers:

  • Large file uploads/downloads.
  • Video editing.
  • Games.
  • Heavy calculations.

6. Core Components:

  • Web Workers (separate threads).
  • SharedArrayBuffer (memory sharing).
  • MessageChannel (communication).

7. Limitations:

  • Cannot manipulate the DOM.
  • Cannot directly share variables with the main thread.
  • Uses additional memory.

Thus, parallel programming makes browsers faster and more efficient, especially for heavy computations or large data processing tasks.

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