Musings on Tracing in PyPy
Briefly

Tracing JITs, once celebrated for their potential, often focus on loop execution but have waned in popularity as their effectiveness came into question.
JIT compilers, whether method-based or tracing, interleave compiling and execution at runtime, but tracing JITs specifically generate code by monitoring program behavior.
The distinction between regular JIT compilers and meta-JITs lies in their application: regular JITs compile a specific language, while meta-JITs provide a framework for multiple languages.
With nearly two decades of experience with PyPy, I see how its meta-JIT architecture enhances flexibility and efficiency in compiling various programming languages.
Read at PyPy
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