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Optimizing Qwen 3.5-397B MoE on Ironwood TPUs: A Systems Engineering Playbook

This playbook details the development of a modular optimization stack for the Qwen 3.5 model on Ironwood TPUs, highlighting a remarkable 4.7x speedup in inference performance.

Editorial StaffJuly 14, 20261 MIN READ
Optimizing Qwen 3.5-397B MoE on Ironwood TPUs: A Systems Engineering Playbook

Engineers have successfully created a modular optimization stack using JAX and Pallas to enhance the performance of the Qwen 3.5 Mixture-of-Experts model on Ironwood TPUs.

This innovative approach has led to an impressive 4.7 times speedup in inference for workloads that are heavy on prefill operations.

The focus on optimizing the 397 billion parameter model demonstrates the potential for significant advancements in machine learning efficiency.