JavaScript: Used for all client-side interactions and powered by the React framework. The development of HHVM was a strategic move to optimize performance and differentiate their infrastructure.
Why Facebook Chose HHVM to Power Their Tech Stack and Drive Performance
CSS/HTML: The standard languages for structuring and styling web pages. For the user interface, the frontend is largely built using React, a JavaScript library developed by Facebook engineers.
Python: Often utilized for scripting, automation, and data analysis tasks within the engineering workflow. The combination of HHVM, PHP, and Hack runs on thousands of servers, managed through a custom-built orchestration system.
Why Facebook Chose HHVM to Power Their Hack and PHP Backend
The language’s flexibility allowed for quick iteration, which was essential during the company's formative years. This creates a full-stack environment where the backend logic written in Hack communicates with the dynamic frontend rendered in the browser.
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