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chore: upgrade flashinfer 0.4.0rc0#10587

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zhyncs wants to merge 1 commit intomainfrom
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chore: upgrade flashinfer 0.4.0rc0#10587
zhyncs wants to merge 1 commit intomainfrom
zhyncs/rc0

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@zhyncs zhyncs commented Sep 18, 2025

Motivation

Modifications

Accuracy Tests

Benchmarking and Profiling

Checklist

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Summary of Changes

Hello @zhyncs, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request focuses on a routine maintenance task: upgrading the flashinfer_python library to its 0.4.0rc0 release candidate. This update ensures the project benefits from the latest features, performance improvements, or bug fixes available in the newer version of FlashInfer, and aligns the internal version validation with the updated dependency.

Highlights

  • FlashInfer Version Upgrade: The flashinfer_python dependency has been updated from version 0.3.1 to 0.4.0rc0 in both pyproject.toml and pyproject_other.toml files, ensuring the project uses the latest release candidate.
  • Runtime Version Alignment: The version check within python/sglang/srt/entrypoints/engine.py for flashinfer_python has been adjusted to 0.4.0rc0 to match the newly upgraded dependency, maintaining consistency across the codebase.
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Code Review

This pull request upgrades the flashinfer dependency to version 0.4.0rc0. While the changes are mostly correct, there are two points to consider. First, using a release candidate version in dependencies can be risky. Second, one of the dependency groups (blackwell) was not updated to the new version, which could lead to inconsistencies. I've added comments with more details.

Comment thread python/pyproject.toml
"torchvision",
"cuda-python",
"flashinfer_python==0.3.1",
"flashinfer_python==0.4.0rc0",
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high

Using a release candidate (RC) version (0.4.0rc0) for flashinfer_python introduces a potential risk of instability, as RC versions are not considered production-ready. It is highly recommended to use stable releases for dependencies to ensure reliability. If this RC is required for a specific feature or fix, please consider adding a comment explaining the necessity.

"torchvision",
"cuda-python",
"flashinfer_python==0.3.1",
"flashinfer_python==0.4.0rc0",
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high

While flashinfer_python is updated to 0.4.0rc0 here in the srt dependency group, the blackwell group on line 83 still references the old version 0.3.1. This inconsistency should be resolved by updating all occurrences of flashinfer_python to the new version to avoid potential build or runtime issues.

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