Skip hash computation for EPContext models #25106
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Add early exit in ComputeModelGraphHash when EPContext nodes are present, returning "0" to indicate pre-compiled model state. Conditionally skip ComputeModelWeightHash when graph hash is "0" to avoid unnecessary computation for pre-compiled models. This optimization reduces overhead for models containing EPContext nodes, which represent execution provider pre-compiled subgraphs.
snnn
approved these changes
Jun 19, 2025
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Description
Add early exit in ComputeModelGraphHash when EPContext nodes are present, returning "0" to indicate pre-compiled model state. Conditionally skip ComputeModelWeightHash when graph hash is "0" to avoid unnecessary computation for pre-compiled models.
This optimization reduces overhead for models containing EPContext nodes, which represent execution provider pre-compiled subgraphs.
Motivation and Context
Currently, the hash generated by ComputeModelGraphHash function when the graph contains EPContext nodes does not correctly represent the graph because we do not hash the contents of the context pointed to by the EPContext node. Thus, it makes more sense to skip hashing for cases involving EPContext nodes.