---
id: pr-vllm-35422
repo: vllm-project/vllm
pr: 35422
title: '[Performance] Extract KV cache update op from flashinfer forward'
author: ElizaWszola
date: '2026-02-26'
url: https://github.com/vllm-project/vllm/pull/35422
source_category: upstream-code
architectures:
- sm100
tags:
- attention
techniques: []
hardware_features: []
kernel_types:
- attention
languages:
- python
captured_at: '2026-04-27'
status: merged
merge_sha: 98217b09f9ce22429ce35badfa1d50e1f4fe4137
inclusion_reason: kernel file changes
changed_paths:
- vllm/v1/attention/backends/flashinfer.py
head_ref_oid: 52ad09e3f5a36b9f5374d0a7c9ba9f24fabd4e4b
artifact_dir: evidence/pull-bundles/vllm/gh-35422
---
# [Performance] Extract KV cache update op from flashinfer forward

- Repository: `vllm-project/vllm`
- PR: [35422](https://github.com/vllm-project/vllm/pull/35422)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `vllm/v1/attention/backends/flashinfer.py`

## Evidence Bundle

`evidence/pull-bundles/vllm/gh-35422`
