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Static Automatic Batching In TensorFlow
Ashish Agarwal

Tue Jun 11 05:00 PM -- 05:05 PM (PDT) @ Grand Ballroom

Dynamic neural networks are becoming increasingly common, and yet it is hard to implement them efficiently. One-the-fly operation batching for such models is sub-optimal and suffers from run time overheads, while writing manually batched versions can be hard and error-prone. To address this we extend TensorFlow with pfor, a parallel-for loop optimized using static loop vectorization. With pfor, users can express computation using nested loops and conditional constructs, but get performance resembling that of a manually batched version. Benchmarks demonstrate speedups of one to two orders of magnitude on range of tasks, from jacobian computation, to TreeLSTMs.

Author Information

Ashish Agarwal (Google Brain)

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