junyixie / build-your-own-x

🤓 Build your own (insert technology here)

! 👋

A Software Engineer, Virtual Machine & Compiler Optimization

Experience:

• ByteDance: Python Virtual Machine, C++/Swift Compiler, Crash report and analyse systems.
• Alibaba: Focused on improving app performance.

Projects:

1. Python Virtual Machine:

   • JIT Compiler (ARM64): Developed a method-based JIT compiler for cpython.
   • Parallel Execution Support: Optimized cpython runtime for parallel execution using subinterpreters.
   • Micro PythonVM: Created a high-performance C++ Python VM for mobile devices.
   • AOT Compiler: Developed a high-performance AOT Compiler for Python on mobile devices.

2. LLVM Compiler Passes for Hotfix in C++/Swift:

   • Implemented hookable indirect function dispatch in the LLVM compiler backend.

3. Bytedance Crash Reporter System:

   • Designed and implemented crash reporting system(mach & posix) and symbolic(high concurrency service) & aggregation(distributed) systems.

4. Taobao App Performance Enhancement:

   • Developed a binary layout optimization system for the Taobao iOS app.
   • Automated a Dark Mode system for iOS applications.