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Long Yixing

PROFILE

Long Yixing

Yixing Long contributed to the ml-explore/mlx and unslothai/unsloth repositories by developing and refining GPU-accelerated matrix and tensor operations, focusing on CUDA and Metal backends. He implemented advanced features such as quantized gather matrix multiplication and complex number sorting with robust NaN handling, using C++ and Python to ensure correctness and performance across platforms. His work included strengthening test coverage, improving export reliability for LoRA adapters, and enhancing input validation in MLX CCE. These efforts resulted in more reliable model exports, faster iteration cycles, and improved backend parity, demonstrating a deep understanding of numerical methods and backend development.

Overall Statistics

Feature vs Bugs

63%Features

Repository Contributions

13Total
Bugs
3
Commits
13
Features
5
Lines of code
8,009
Activity Months3

Work History

May 2026

4 Commits • 1 Features

May 1, 2026

May 2026 monthly summary: Delivered targeted improvements in model export reliability, LoRA metadata handling, and MLX CCE robustness across unsloth and unsloth-zoo. Key outcomes include LoRA metadata persistence improvements and refined export behavior, a fix to MLX Studio exports using the merged_16bit save method, and hardened MLX CCE input validation with broader edge-case tests. Expanded test coverage and diagnostics increased stability and surfaced issues earlier in the development cycle, reducing downstream risk and rework. Business value: stronger export correctness, better cross-version compatibility with MLX, and improved resilience of MLX CCE components translate to faster release cycles, fewer production incidents, and smoother Studio integrations.

April 2026

3 Commits • 2 Features

Apr 1, 2026

Month: 2026-04 — Delivered two major backend enhancements in ml-explore/mlx, emphasizing performance, correctness, and test coverage across Metal and CUDA backends. No critical bugs reported this month; work focused on feature delivery that enables more efficient ML workloads on GPU stacks. Overall impact: improved GPU-backed tensor operations for complex-valued data and quantized matmul, with broader backend parity and reliability, driving faster model iteration and deployment.

March 2026

6 Commits • 2 Features

Mar 1, 2026

March 2026 performance summary for ml-explore/mlx highlighting CUDA-accelerated matrix/tensor capabilities, expanded numeric data-type support, and strengthened numeric correctness. Focused on delivering business value through higher throughput, broader capabilities, and robust tests.

Activity

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Quality Metrics

Correctness92.2%
Maintainability81.6%
Architecture87.6%
Performance87.8%
AI Usage29.2%

Skills & Technologies

Programming Languages

C++CUDAPython

Technical Skills

C++CUDACUDA programmingData ProcessingData StructuresGPU ProgrammingGPU computingMachine LearningMatrix MultiplicationMatrix OperationsMatrix operationsModel TrainingNumerical MethodsNumerical algorithmsPerformance optimization

Repositories Contributed To

3 repos

Overview of all repositories you've contributed to across your timeline

ml-explore/mlx

Mar 2026 Apr 2026
2 Months active

Languages Used

C++CUDAPython

Technical Skills

CUDACUDA programmingData ProcessingData StructuresGPU ProgrammingGPU computing

unslothai/unsloth-zoo

May 2026 May 2026
1 Month active

Languages Used

Python

Technical Skills

Data ProcessingMachine LearningModel TrainingPython DevelopmentPython ProgrammingSoftware Development

unslothai/unsloth

May 2026 May 2026
1 Month active

Languages Used

Python

Technical Skills

Pythonbackend development