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Experimental toolchain to compile and run Chainer models

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Chainer compiler: experimental toolchain to compile and run Chainer models

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This is an experimental toolchain expected to be used with Chainer. This project aims to achieve a bunch of correlated goals such as

  • Make Python Chainer model deployable without Python runtime
  • Efficiently execute Chainer models with optimization techniques
  • Integrate Chainer with other systems or domain-specific chips
  • Be a playground to try algorithms for neural network frameworks

without sacrificing flexibility and coverage of Chainer.

To achieve these goals, this toolchain

  • Translates Python AST to extended ONNX. As this is a compiler rather than an execution tracer, it can export Python code with control-flows (e.g., LSTM with attention written by Python's loop)
  • Modifies the graph for optimization, auto-differentiation, etc. It then generates deployable code.
  • Runs the exported code with ChainerX's C++ API. Currently, the only backend it supports is a simple virtual machine implemented by ChainerX.

This project is still in the early stage and is not expected to be used by end-users. Interfaces can change quickly and some features may be abandoned. That said, it will be appreciated if you try this a bit and give us any feedbacks. Also, importantly, we are hiring! If you are interested in working on deep learning frameworks, please consider applying to Preferred Networks.

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