Learn HACK with Real Code Examples
Updated Nov 20, 2025
Performance Notes
Optimized via HHVM JIT compilation
Static typing improves runtime safety
Async programming reduces blocking
Use Hack collections for efficient memory usage
Gradual typing allows incremental performance tuning
Security Notes
Static typing helps prevent runtime type errors
Validate user input and outputs
Use HHVM security best practices
Avoid unsafe PHP function usage
Implement secure async operations
Monitoring Analytics
Monitor async workflows and performance
Check HHVM server logs
Validate type safety with hh_client
Profile resource usage
Audit deployed Hack services
Code Quality
Use static typing for clarity and safety
Organize code into modules and namespaces
Document shapes, generics, and functions
Write unit and integration tests
Leverage typechecker to catch errors early