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Python’s Execution Model – Bytecode, PVM, and JIT Compilation
Python is often described as an interpreted language, but there's more going on under the hood. Unlike purely interpreted languages, Python compiles source code into bytecode, which is then executed by the Python Virtual Machine (PVM). Understanding this execution model helps developers optimize performance, debug effectively, and write more efficient Python programs. In this post, we’ll explore: ✅ How Python source code is executed ✅ What bytecode is and why it matters ✅ The role of the Python Virtual Machine (PVM) ✅ How Just-In-Time (JIT) compilation can improve performance 1️⃣ From Source Code to Execution: Python’s Execution Model ✅ The Three Main Steps in Python Execution Source Code (.py file) – The Python script you write. Compilation to Bytecode (.pyc files) – Python converts source code into an intermediate format called bytecode. Execution by the Python Virtual Machine (PVM) – The PVM reads the bytecode and executes it line by line.
Python is often described as an interpreted language, but there's more going on under the hood. Unlike purely interpreted languages, Python compiles source code into bytecode, which is then executed by the Python Virtual Machine (PVM). Understanding this execution model helps developers optimize performance, debug effectively, and write more efficient Python programs.
In this post, we’ll explore:
✅ How Python source code is executed
✅ What bytecode is and why it matters
✅ The role of the Python Virtual Machine (PVM)
✅ How Just-In-Time (JIT) compilation can improve performance
1️⃣ From Source Code to Execution: Python’s Execution Model
✅ The Three Main Steps in Python Execution
Source Code (.py file) – The Python script you write.
Compilation to Bytecode (.pyc files) – Python converts source code into an intermediate format called bytecode.
Execution by the Python Virtual Machine (PVM) – The PVM reads the bytecode and executes it line by line.
