The V8 JavaScript Engine

Introduction

The Javascript engine that powers Google chrome is called V8. while browsing on chrome, the V8 engine takes our javascript and executes it.

Javascript executes in a runtime environment provided by V8. The browser also provides the DOM and other web platform APIs.

The best part is that the engine is entirely independent of the browser on which we host it.

And this feature was the reason behind the rise of Node.js. In 2009, V8 was chosen as the engine that powers Node.js, And now V8 powers an enormous amount of server-side code written in Javascript.

Now let’s have a look at the other Javascript engines:

Other Javascript Engines

Other Javascript engines that specific browsers have are as follows:

  • Firefox - SpiderMonkey
  • Safari - JavaScriptCore (Nitro)
  • Edge - Originally was based on Chakra but now has been rebuilt using chromium and V8.

Let’s now see the quest for the performance of the V8 engine.

The quest for performance

The language that is used to write the V8 engine is C++ and is improving continuously. It runs on everything from a Mac to Linux, including windows and several other systems, and it’s portable as well.

It is an evolving Javascript engine just like the others present around, and this is to speed up the Node.js ecosystem and the web.

The web is filled up with a race for performance between all the engines. This benefits us as users and developers because we are provided with better, faster, and highly optimized machines every year.

Compilation

Javascript is always considered an interpreted language, But the modern Javascript engines don’t just interpret Javascript. They compile it as well.

This was started in 2009 when the engine for firefox 3.5 was released and was named SpiderMonkey, which compiled Javascript. And thus, everyone liked and followed the same idea.

Using JIT(Just-In-Time) compilation, Javascript is internally compiled by V8 for fast execution.

Since Google Maps were introduced in 2004, Javascript has evolved to a whole new level. It is no longer a language that was just used to execute a few dozens of lines of code to complete our applications. Instead, it has evolved into a language that executes hundreds of thousands of lines of code running in the browser.

Our applications can now run seamlessly for hours inside a browser instead of some scripts or a few form validation rules.

Let us now have a look at the frequently asked questions.

Frequently asked questions

  1. Why is there a need to use JavaScript?
    Well, to make our website dynamic and interactive, we need JavaScript. Simple static websites don’t require JavaScript at all. Dynamic websites have different logics for each event, and we need JavaScript for implementing these logics.
     
  2. What is a V8 engine?
    The Javascript engine that powers Google chrome is called V8. while browsing on chrome, the V8 engine takes our javascript and executes it.
     
  3. What is Javascript?
    Javascript is a high-level scripting language for the web.
     
  4. What is the use of Javascript?
    Javascript is most commonly used in creating web pages. It is also used for building apps, games, servers, etc.
     
  5. Is it easy to learn javascript?
    Javascript is a beginner-friendly language and is easy to learn. Javascript has a wide variety of applications, and learning it would be a good investment. 

Key Takeaways

The Javascript engine that powers Google chrome is called V8. while browsing on chrome, the V8 engine takes our javascript and executes it.

Javascript executes in a runtime environment provided by V8. The browser also provides the DOM and other web platform APIs.

Javascript is a popular and influential scripting language. It is most commonly used to create web pages; however, it has many other applications. It is very easy to start learning javascript, and all you require is a web browser and a text editor. 

Already excited?. Learn Javascript from top courses provided by Coding Ninjas like ‘Starting with Javascript.’ Want to go full-stack with Javascript?. Check out Full Stack Web Development Course with Node.js + HTML/CSS/JS offered by Coding Ninjas. These tutorials and courses will help you learn and master Javascript to become a ninja in it!.  

Happy Learning!

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