Top Python Libraries

Top Python Libraries

Pyjion: JIT for CPython – Run Python as .NET

Pyjion adds JIT to CPython, compiling Python to .NET for instant speed boosts. Seamless, no code changes—just pip install. Perfect for web backends & heavy workloads.

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Meng Li
May 19, 2025
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Today, let’s talk about a super cool project—Pyjion. Sounds like “pigeon,” right? Yep, it’s like something ordinary that suddenly takes flight with wings.

Pyjion adds JIT to CPython, compiling your Python code directly into native CIL executable by .NET 7 CLR, unleashing performance potential instantly. Let’s dive into how it works and whether it’s worth trying.

What is Pyjion?

Pyjion is a JIT extension for CPython. Your Python code is captured at runtime, passed to .NET CLR’s JIT compiler, and turned into native machine code. Instead of repeated interpretation, it “jumps” straight to efficient machine instructions. Think of it as embedding a super accelerator into CPython.

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