What is Node JS? A Guide for Beginners - CoinNav.io
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Node.js Architecture and Its Unique Approach
Node.js adopts the "Single Threaded Event Loop" architecture, enabling efficient handling of multiple clients simultaneously. To comprehend its distinction from other runtimes, it's essential to understand how concurrent clients are managed in languages like Java.
In a multi-threaded request-response model, various clients send requests, and the server processes each one before sending back responses. However, multiple threads are employed to handle concurrent calls, forming a thread pool where individual threads are assigned to process incoming requests.
Node.js, on the other hand, follows a different approach, and here's how it works:
- Limited Thread Pool: Node.js maintains a restricted thread pool to handle requests, which contributes to its efficiency.
- Queueing Requests: When a request arrives, Node.js places it into a queue, awaiting further processing.
- The Core Component - Event Loop: The single-threaded "Event loop," which is the heart of Node.js, comes into play. It continuously waits for requests.
- Processing Requests: When a request reaches the front of the queue, the event loop checks whether it requires a blocking input/output (I/O) operation. If the request does not involve any blocking operation, it proceeds to process the request and sends the response.
- Handling Blocking I/O Operations: In case the request involves a blocking I/O operation, the event loop assigns a thread from the internal thread pool, known as the worker group, to handle the request. This worker group consists of limited auxiliary threads specifically for handling such blocking tasks.
- Non-Blocking Nature: The event loop keeps track of blocking requests and queues them until the blocking tasks are completed. This ensures that Node.js maintains its non-blocking nature, enhancing its performance and responsiveness.
Node.js' choice to utilize fewer threads results in efficient resource and memory usage, ultimately leading to faster task execution. For real-time applications that prioritize responsiveness, Node.js proves to be a compelling choice. However, when dealing with data-intensive tasks, multi-threaded languages like Java may be more suitable. In summary, Node.js' single-threaded architecture effectively manages concurrent clients and excels in real-time application scenarios.
Expanding Market Reach
Over the past two decades, there has been a remarkable surge in the number of websites, and Node.js has kept pace with this rapid growth. The widely adopted runtime has already surpassed the remarkable milestone of 1 billion downloads, achieved as early as 2018. According to W3Techs, Node.js is harnessed by approximately 1.2% of all websites worldwide, which amounts to a staggering figure of over 20 million websites across the internet.
As expected, Node.js has also become a popular choice among numerous companies, attracting millions of users. Let's highlight a few well-known companies that currently leverage the capabilities of Node.js:
The wide adoption of Node.js by industry giants and numerous other enterprises underscores its significance and relevance in today's digital landscape. As the demand for efficient and scalable web solutions continues to grow, Node.js remains at the forefront of technologies shaping the internet's future.
Is Node.js a Programming Language?
In short: No.
Is Node.js Frontend or Backend?
A common misconception among developers is that Node.js is solely a backend framework used exclusively for building servers. However, this assumption is not accurate: Node.js can be effectively utilized both on the frontend and the backend.
The popularity of Node.js frameworks for creating flexible and scalable backends stems from its event-driven, non-blocking nature. Nevertheless, frontend developers can also benefit from Node.js and experience its advantages in their own work.
Let's delve into why Node.js is suitable for both backend and frontend development:
- Vibrant Community Support: A thriving online community plays a vital role in accelerating the development cycle. When facing challenges, developers can find solutions and guidance through platforms like Stack Overflow, where solutions to various issues related to Node.js are readily available. The active and engaged Node.js community greatly contributes to its popularity and offers an extensive collection of packages and resources.
In conclusion, Node.js is a versatile technology that can be effectively employed for both frontend and backend development. Its reusability, improved productivity, and extensive community support make it a valuable asset for developers seeking to build robust and efficient applications across different domains.
History of Node.js
Node.js gained widespread acceptance among developers due to its impressive performance and scalability. Today, major organizations such as Netflix, NASA, LinkedIn, PayPal, and others utilize Node.js to build robust applications for their users.
Notably, Node.js has achieved extraordinary popularity and recognition in the tech community. In the latest StackOverflow Developer Survey, Node.js ranked as the most popular technology in the "Web Frameworks and Technology" category, underscoring its widespread adoption and relevance in the present day.