PyPy
PyPy is an alternative Python interpreter and just-in-time (JIT) compiler that aims to improve the performance of Python code, often making it significantly faster than the standard CPython interpreter. It is a drop-in replacement for CPython, supporting most Python libraries and frameworks while offering features like memory efficiency and compatibility with Python versions. PyPy achieves speed-ups through its JIT compilation, which dynamically optimizes code at runtime, particularly benefiting long-running applications.
Developers should use PyPy when they need to speed up Python applications, especially for CPU-intensive tasks, web servers, or scientific computing, where performance bottlenecks are common. It is ideal for projects where compatibility with existing Python code is crucial but faster execution is desired, such as in data processing pipelines or backend services. However, it may not be suitable for all use cases, as some C extensions or libraries might have limited support compared to CPython.