---
id: pr-sglang-7145
repo: sgl-project/sglang
pr: 7145
title: 'Remove 200us slow concat kernel (part 1: kernel)'
author: fzyzcjy
date: '2025-06-13'
url: https://github.com/sgl-project/sglang/pull/7145
source_category: upstream-code
architectures:
- sm100
tags: []
techniques: []
hardware_features: []
kernel_types: []
languages: []
captured_at: '2026-05-16'
status: merged
merge_sha: aa46ed34d25730d532fe15068c02ddbe7c83f730
inclusion_reason: defer
changed_paths:
- sgl-kernel/benchmark/bench_cutlass_mla.py
- sgl-kernel/csrc/attention/cutlass_mla_kernel.cu
- sgl-kernel/csrc/common_extension.cc
- sgl-kernel/include/sgl_kernel_ops.h
- sgl-kernel/python/sgl_kernel/attention.py
- sgl-kernel/tests/test_cutlass_mla.py
artifact_dir: evidence/pull-bundles/sglang/gh-7145
head_ref_oid: d3fad604d96070aa34d3b20c1a1ca175236942b7
---
# Remove 200us slow concat kernel (part 1: kernel)

- Repository: `sgl-project/sglang`
- PR: [7145](https://github.com/sgl-project/sglang/pull/7145)
- Decision: `defer`
- Reason: defer

## Changed Paths

- `sgl-kernel/benchmark/bench_cutlass_mla.py`
- `sgl-kernel/csrc/attention/cutlass_mla_kernel.cu`
- `sgl-kernel/csrc/common_extension.cc`
- `sgl-kernel/include/sgl_kernel_ops.h`
- `sgl-kernel/python/sgl_kernel/attention.py`
- `sgl-kernel/tests/test_cutlass_mla.py`

## Evidence Bundle

`evidence/pull-bundles/sglang/gh-7145`
