JavaScript runtime environment that executes JavaScript code outside of a web browser using the <strong>V8 engine</strong>. It is mostly used for event-driven servers such as ordinary websites and back-end <a href=https://www.bitdegree.org/"/crypto/learn/crypto-terms/what-is-api/">API services. In simple terms, Node.js runs full websites on a single \"<strong>stack</strong>,\" allowing you to focus on the project's business objectives rather than development and maintenance.</p>\n<p>Though a key aspect to remember about Node.js is that it is a runtime environment, not a framework or library, as is the case with <strong>traditional application software</strong>. A runtime environment (RTE) is a set of Web APIs that a developer can use to write code, and a JavaScript engine to read it. This makes it <strong>lightweight</strong>, adaptable, and simple to deploy, all of which will help you optimize and speed up your application development project.</p>\n<p>Besides, note that Node.js is free and it is <strong>constantly improved</strong> by a global developer community since it is open-source.</p>\n<h3>The Basic Architecture of Node.js</h3>\n<p>Node.js is popular among programmers due to its architecture. Unlike most other runtime environments that run on multi-threaded processing, <strong>Node.js works on a single thread</strong>.</p>\n<p>Each server in a multi-threaded processing configuration has a thread pool that it can access. Therefore, whenever a server receives a request, it <strong>chooses a thread from the pool</strong> and assigns it to the request for processing. In this scenario, the processing is synchronous and sequential, which means that only one operation is performed at a time.</p>\n<p>When using multiple-thread processing, <strong>a thread is assigned to each request until all threads have been utilized</strong>. When this occurs, the server must wait for a thread that has become unavailable to become available again. This could lead to slow and inefficient apps, which can have a <strong>negative impact on</strong> everything from customer experience to lead conversions. It's especially complicated if your application has to process a big number of client requests at the same time.</p>\n<p>In contrast, Node.js runs on a single thread. The difference between the two is that <strong>single-thread systems are likely to use event loops</strong> to do non-blocking Input/Output activities. The principle of a single-thread design is that it can run and grow faster and more effectively than multiple-thread designs. Ryan Dahl had this in mind when he designed Node.js, and it's <strong>one of the reasons why it's so popular</strong> among web application developers.</p>\n<h2>Examples of Node.js Usage in Application Development</h2>\n<p>Here are some of the most well-known examples of applications that use Node.js for their development.</p>\n<h3>NASA</h3>\n<p>In this case, Node.js is crucial because it saves lives by keeping astronauts safe during risky space flights. NASA had to find a way to unify data linked to EVA spacesuits into a single cloud database <strong>to minimize access times</strong>. They needed to do that after a near-fatal mishap caused by inefficient data stored in many locations. The new Node.js-based system cut the process's number of steps from 28 to 7.</p>\n<h3>Walmart</h3>\n<p>Walmart is the world's largest retailer, and it's getting into the online shopping game. The organization decided to join the Node.js bandwagon to re-engineer its mobile app. They wanted to include <strong>more complex functionality</strong>. Node.js was praised by Walmart for its asynchronous I/O and single-threaded event loop architectures, which enabled it to handle several inquiries at the same time.</p>\n<h3>LinkedIn</h3>\n<p><strong>LinkedIn</strong>, the world's largest business and employment-oriented social networking site migrated its mobile app from Ruby on Rails to Node.js. It turned out to be a sensible idea, despite the fact that it was still a rather immature runtime environment at the time. The <strong>new software was 2-10 times faster</strong> than the old one and was also much lighter. In addition, the development time was really short.</p>\n<h3>Netflix</h3>\n<p>Probably everybody knows what Netflix is. Though not everyone might know that it's a data-driven platform that does rigorous A/B testing to give its 195 million+ global users a rich experience. The enormous number of <strong>unique packages</strong> released each push cycle adds to the complexity of conditional dependencies and app scalability. Therefore, the company chose Node.js, which is light and fast. A 70% reduction in loading time was one of the most significant outcomes of choosing Node.js.</p>","level":"hard","meta_title":"What is Node.js? 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One?","featured_image_id":11310,"status":"published","chapter_id":7,"language":"en","order":3,"modified_content":null,"preview_url":"https://www.bitdegree.org/crypto/learn/ico-vs-ido","featured_image":{"id":11310,"uuid":"315e8a2b-93a1-4870-be48-a2a09d801663","public_url":"https://assets.bitdegree.org/crypto/storage/optimized/ico-vs-ido-featured-image.jpg","path":"crypto/storage/optimized/ico-vs-ido-featured-image.jpg","original_path":"crypto/storage/original/ico-vs-ido-featured-image.jpg","name":"ico-vs-ido-featured-image.jpg","original_name":"ico-vs-ido-featured-image.jpg","title":null,"alt":null,"width":1024,"height":576,"disk":"spaces","status":"uploaded","readable_file_size":"64.39KB"},"youtube_video":null},{"slug":"what-is-an-airdrop","title":"What are Crypto Airdrops and How to Get Them?","featured_image_id":11359,"status":"published","chapter_id":7,"language":"en","order":4,"modified_content":null,"preview_url":"https://www.bitdegree.org/crypto/learn/what-is-an-airdrop","featured_image":{"id":11359,"uuid":"7b43c968-1275-4d3e-acb1-1707a43a4014","public_url":"https://assets.bitdegree.org/crypto/storage/optimized/what-is-an-airdrop-featured-image.jpg","path":"crypto/storage/optimized/what-is-an-airdrop-featured-image.jpg","original_path":"crypto/storage/original/what-is-an-airdrop-featured-image.jpg","name":"what-is-an-airdrop-featured-image.jpg","original_name":"what-is-an-airdrop-featured-image.jpg","title":null,"alt":null,"width":1024,"height":576,"disk":"spaces","status":"uploaded","readable_file_size":"66.05KB"},"youtube_video":null},{"slug":"how-to-get-free-crypto","title":"How to Get Free Crypto 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Pulls?","featured_image_id":6555,"status":"published","chapter_id":7,"language":"en","order":10,"modified_content":null,"preview_url":"https://www.bitdegree.org/crypto/learn/how-to-avoid-rug-pulls-in-crypto","featured_image":{"id":6555,"uuid":"80cbed9d-3b4b-45d9-9a85-d2d8108c0f32","public_url":"https://assets.bitdegree.org/crypto/storage/media/how-to-avoid-rug-pulls.o.jpg","path":"crypto/storage/media/how-to-avoid-rug-pulls.o.jpg","original_path":"crypto/storage/media/how-to-avoid-rug-pulls.jpg","name":"how-to-avoid-rug-pulls.o.jpg","original_name":"how-to-avoid-rug-pulls.jpg","title":null,"alt":null,"width":768,"height":478,"disk":"spaces","status":"uploaded","readable_file_size":"111.99KB"},"youtube_video":null},{"slug":"how-to-avoid-crypto-taxes","title":"The Key Legal Techniques of Avoiding Crypto 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Tokens?","featured_image_id":null,"status":"published","chapter_id":8,"language":"en","order":4,"modified_content":null,"preview_url":"https://www.bitdegree.org/crypto/learn/how-to-track-new-crypto-coins","featured_image":null,"youtube_video":null},{"slug":"how-to-research-crypto","title":"Crypto Research Fundamentals & Social Signals: Your Daily Trading Strategy","featured_image_id":null,"status":"published","chapter_id":8,"language":"en","order":5,"modified_content":null,"preview_url":"https://www.bitdegree.org/crypto/learn/how-to-research-crypto","featured_image":null,"youtube_video":null}]},{"id":9,"title":"Mining","slug":"mining","updated":false,"chapter":"https://assets.bitdegree.org/crypto/assets/crypto-book/chapters/learn-crypto-mining.jpg","chapter_simple":"https://assets.bitdegree.org/crypto/assets/crypto-book/chapters-simple/crypto-mining-101.jpg","rating":80,"sections":[]},{"id":10,"title":"Crypto Terms","updated":false,"chapter":"https://assets.bitdegree.org/crypto/assets/crypto-book/chapters/crypto-101-glossary.jpg","chapter_simple":"https://assets.bitdegree.org/crypto/assets/crypto-book/chapters-simple/crypto-glossary-101.jpg","rating":100,"sections":["A","B","C","D","E","F","G","H","I","J","K","L","M","N","O","P","Q","R","S","T","U","V","W","X","Y","Z"]}],"nextSection":{"id":901,"original_id":null,"author_id":40,"translator_id":null,"title":"What is Network Latency?","slug":"what-is-network-latency","section":"N","keyword":"Network Latency","status":"published","definition":"is the amount of time it takes for a packet of data to travel from one point to another.","content":"<p>The <strong>time needed for a packet of data to move from one location to another</strong> is called network latency. It can be described as both relative time or absolute time with consideration of when the request was sent.</p>\n<p>The quantity of latency that is acceptable relies on the action a user performs online. Email and web browsing have a lower level of latency as opposed to video chatting or gaming.</p>\n<p>This covers both the real distance traveled by the data and the time it takes to be evaluated. As an illustration, suppose you're watching a video on Youtube. The video you're watching is really stored on a server in Arizona, but when you press \"play,\" your request travels across multiple servers before arriving at the destination.&nbsp;</p>\n<p>When your request reaches the server where the video is stored, it must be evaluated before it can be returned to you. It takes time for all of this to happen. High latency causes an additional wait between the time you push the play button and the time the video begins to run.</p>\n<p>Latency is a measurement of time. To be exact, the amount of time it takes for a transaction to be fulfilled. <a href=https://www.bitdegree.org/"/crypto/learn/crypto-terms/what-is-throughput/">Throughput, on the other hand, is the amount of work. It is measured in the number of transactions per second.</p>\n<p>It is better when the displayed latency is lower. <strong>Full router queues</strong>, low <a href=https://www.bitdegree.org/"/crypto/learn/crypto-terms/what-is-bandwidth/">bandwidth connection, and overloaded servers might result in high latency. It is described in milliseconds. 400 ms means 400 milliseconds, and 500 ms means 500 milliseconds.</p>\n<p>50 milliseconds equals one-tenth of a second and is roughly<strong> the maximum amount of latency that a human brain can tolerate, </strong>according to data technology specialists. Even though this is sufficient for most people, gamers, for example, might prefer lower latencies. Professional gamers consider anything more than 100 milliseconds of latency to be too excessive for a decent experience of gaming.</p>\n<p>The characteristic of network latency is very important in the context of <a href=https://www.bitdegree.org/"/crypto/learn/crypto-terms/what-is-cryptocurrency/">cryptocurrencies and <a href=https://www.bitdegree.org/"/crypto/learn/crypto-terms/what-is-blockchain/">blockchain. The reason is that it directly impacts the time taken for a transaction to be accepted.</p>\n<p>Lowering the number of HTTP requests or <strong>decreasing the response time from your servers</strong> is the greatest way to maximize the correlation between latency and throughput. It might also be a good method to attempt to cache as much data as possible and to combine database requests whenever feasible.</p>\n<p>Attempting to raise the throughput of HTTP requests without taking latency into account would only result in performance concerns. The objective should be to maximize throughput while minimizing delay.</p>\n<p>Furthermore, a <a href=https://www.bitdegree.org/"/crypto/learn/crypto-terms/what-is-consensus-mechanism/">consensus mechanism</strong></a> is where <a href=https://www.bitdegree.org/"/crypto/learn/crypto-terms/what-is-miner/">miners depend on speed to earn rewards. Also,&nbsp;blockchains are based on it. Every second that a new block isn&rsquo;t found and added to the blockchain, potential revenue is lost.</p>","level":"medium","meta_title":"What is Network Latency? Definition & Meaning | Crypto Wiki","meta_description":"Network Latency meaning: Network Latency - is the amount of time it takes for a packet of data to travel from one point to another.","meta_keywords":null,"language":"en","created_at":"2022-04-11T06:00:14.000000Z","updated_at":"2022-05-13T14:32:24.000000Z","preview_url":"https://www.bitdegree.org/crypto/learn/crypto-terms/what-is-network-latency"},"prevSection":{"id":563,"original_id":null,"author_id":41,"translator_id":null,"title":"What is Non-Custodial?","slug":"what-is-non-custodial","section":"N","keyword":"Non-Custodial","status":"published","definition":"a decentralized service of holding assets or funds in a smart contract during a transaction or any other financial operation.","content":"<p><strong>Non-custodial</strong> is a service that does not require a third party to hold custody over the assets of a customer during the duration of a transaction or other financial services. The process occurs by using trustless <a href=https://www.bitdegree.org/"/crypto/learn/crypto-terms/what-is-smart-contract/">smart contracts</strong></a>. They are blockchain-based self-executing programs without a central authority.</p>\n<p>While custodial services require a centralized figure to possess the assets of a customer for safekeeping or management, non-custodial services are decentralized as they do not rely on any intermediaries. Non-custodial services are preferred in the crypto industry due to lower risks and a higher level of decentralization.</p>\n<p><strong>Custodial services pose numerous risks</strong>, such as censorship, confiscation, or increased processing time. Some examples of custodial services are <a href=https://www.bitdegree.org/"/crypto/learn/crypto-terms/what-is-centralized-exchange-cex/">centralized exchange platforms (CEXs)</strong></a> such as Coinbase and Binance, digital asset management services like PayPal, or fiat-backed <a href=https://www.bitdegree.org/"/crypto/learn/crypto-terms/what-is-stablecoin/">stablecoins, such as Tether (USDT) or the USD Coin (USDC).</p>\n<p><strong>Non-custodial services are trustless</strong>, meaning that they do not rely on any centralized authorities. Furthermore, they are censorship-resistant, cannot be confiscated, offer faster processing times, and do not pose the risk of insolvency or downtime. Decentralized services are considered to be less complex to use than custodial services.</p>\n<p><a href=https://www.bitdegree.org/"/crypto/learn/crypto-terms/what-is-decentralized-exchange-dex/">Decentralized exchange platforms (DEXs)</strong></a> like Uniswap or Binance Dex, are the prime examples of non-custodial services. <a href=https://www.bitdegree.org/"/crypto/learn/crypto-terms/what-is-algorithmic-stablecoin/">Algorithmic stablecoins</strong></strong></a> like Dai (DAI) and Ampleforth (AMPL), digital asset management services such as Genesis Vision, and lending/borrowing services like Compound also act as non-custodial.</p>\n<p>Customers can find non-custodial wallet solutions, which allow them to maintain full ownership over their crypto assets by holding both their <a href=https://www.bitdegree.org/"/crypto/learn/crypto-terms/what-is-private-key-secret-key/">private keys</strong></a> and <a href=https://www.bitdegree.org/"/crypto/learn/crypto-terms/what-is-recovery-seed/">recovery seeds</strong></a>. This includes both <strong>hot wallets</strong> like TrustWallet, and <strong>hardware wallets</strong> such as Ledger or Trezor.</p>\n<p>Custodial services provide customers with reliable recovery and security, as centralized services insure the assets in the event of theft or other malicious activities. Using non-custodial services may be riskier as some bugs or errors within the smart contracts may be used as exploits for theft.&nbsp;</p>\n<p>Furthermore, if the customer of a non-custodial service loses their access to the account, they may be unable to recover the funds. <strong>Custodial assets are easier to recover</strong> due to the identification methods available.</p>\n<p><a href=https://www.bitdegree.org/"/crypto/learn/crypto-terms/what-is-anti-money-laundering-aml/">Anti-money laundering (AML)</strong></a> regulations like the <a href=https://www.bitdegree.org/"/crypto/learn/crypto-terms/what-is-fatf-travel-rule/">FATF Travel Rule</strong></a> directly affect custodial cryptocurrency services. This push toward regulation has piqued users&rsquo; interest in non-custodial solutions which offer anonymity.</p>","level":"medium","meta_title":"What is Non-Custodial? Definition & Meaning | Crypto Wiki","meta_description":"Non-Custodial meaning: Non-Custodial - a decentralized service of holding assets or funds in a smart contract during a transaction or any other financial operation.","meta_keywords":null,"language":"en","created_at":"2022-03-24T07:41:12.000000Z","updated_at":"2022-09-16T05:58:04.000000Z","preview_url":"https://www.bitdegree.org/crypto/learn/crypto-terms/what-is-non-custodial"},"currentChapter":"N","currentSection":"what-is-node-js","chapterTitle":"N","readingLevel":"hard"},"url":"/crypto/learn/crypto-terms/what-is-node-js","version":"cdd198d50cbe5c9c21c9329d7c096ffc"}" class="container-fluid d-flex crypto-book p-0">
Crypto Terms: Letter N

What is Node.js?

Node.js MEANING:
Node.js - a back-end JavaScript runtime environment based on the V8 engine that executes JavaScript code outside of a web browser.
Hard
3 minutes

Let's find out Node.js meaning, definition in crypto, what is Node.js, and all other detailed facts.

Node.js is a cross-platform open-source back-end JavaScript runtime environment that executes JavaScript code outside of a web browser using the V8 engine. It is mostly used for event-driven servers such as ordinary websites and back-end API services. In simple terms, Node.js runs full websites on a single "stack," allowing you to focus on the project's business objectives rather than development and maintenance.

Though a key aspect to remember about Node.js is that it is a runtime environment, not a framework or library, as is the case with traditional application software. A runtime environment (RTE) is a set of Web APIs that a developer can use to write code, and a JavaScript engine to read it. This makes it lightweight, adaptable, and simple to deploy, all of which will help you optimize and speed up your application development project.

Besides, note that Node.js is free and it is constantly improved by a global developer community since it is open-source.

The Basic Architecture of Node.js

Node.js is popular among programmers due to its architecture. Unlike most other runtime environments that run on multi-threaded processing, Node.js works on a single thread.

Each server in a multi-threaded processing configuration has a thread pool that it can access. Therefore, whenever a server receives a request, it chooses a thread from the pool and assigns it to the request for processing. In this scenario, the processing is synchronous and sequential, which means that only one operation is performed at a time.

When using multiple-thread processing, a thread is assigned to each request until all threads have been utilized. When this occurs, the server must wait for a thread that has become unavailable to become available again. This could lead to slow and inefficient apps, which can have a negative impact on everything from customer experience to lead conversions. It's especially complicated if your application has to process a big number of client requests at the same time.

In contrast, Node.js runs on a single thread. The difference between the two is that single-thread systems are likely to use event loops to do non-blocking Input/Output activities. The principle of a single-thread design is that it can run and grow faster and more effectively than multiple-thread designs. Ryan Dahl had this in mind when he designed Node.js, and it's one of the reasons why it's so popular among web application developers.

Examples of Node.js Usage in Application Development

Here are some of the most well-known examples of applications that use Node.js for their development.

NASA

In this case, Node.js is crucial because it saves lives by keeping astronauts safe during risky space flights. NASA had to find a way to unify data linked to EVA spacesuits into a single cloud database to minimize access times. They needed to do that after a near-fatal mishap caused by inefficient data stored in many locations. The new Node.js-based system cut the process's number of steps from 28 to 7.

Walmart

Walmart is the world's largest retailer, and it's getting into the online shopping game. The organization decided to join the Node.js bandwagon to re-engineer its mobile app. They wanted to include more complex functionality. Node.js was praised by Walmart for its asynchronous I/O and single-threaded event loop architectures, which enabled it to handle several inquiries at the same time.

LinkedIn

LinkedIn, the world's largest business and employment-oriented social networking site migrated its mobile app from Ruby on Rails to Node.js. It turned out to be a sensible idea, despite the fact that it was still a rather immature runtime environment at the time. The new software was 2-10 times faster than the old one and was also much lighter. In addition, the development time was really short.

Netflix

Probably everybody knows what Netflix is. Though not everyone might know that it's a data-driven platform that does rigorous A/B testing to give its 195 million+ global users a rich experience. The enormous number of unique packages released each push cycle adds to the complexity of conditional dependencies and app scalability. Therefore, the company chose Node.js, which is light and fast. A 70% reduction in loading time was one of the most significant outcomes of choosing Node.js.