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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.

xiejunyi's Projects

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