By creating Hack and HHVM, they solved the limitations of vanilla PHP without abandoning the speed of development that initially made the language so attractive. Looking deeper into the infrastructure, Facebook operates a massive data center network that supports its global footprint.
Facebook Backend Hack Language Performance and the HHVM Engine
The Runtime Environment: HHVM While PHP and Hack provide the syntax and logic, the HipHop Virtual Machine (HHVM) is the engine that executes this code. C++: Used for performance-critical components, such as the networking stack and certain backend services where PHP might be too slow.
The combination of HHVM, PHP, and Hack runs on thousands of servers, managed through a custom-built orchestration system. HHVM is a just-in-time (JIT) compiler that converts Hack and PHP code into highly optimized machine code at runtime.
Facebook Backend Hack Language Performance and the HHVM Engine
The language’s flexibility allowed for quick iteration, which was essential during the company's formative years. The company did not rely on a single tool but rather built a tailored ecosystem.
More About What language is facebook written in
Looking at What language is facebook written in from another angle can help expand the discussion and give readers a second clear paragraph under the same section.
More perspective on What language is facebook written in can make the topic easier to follow by connecting earlier points with a few simple takeaways.
