---
id: pr-sglang-21019
repo: sgl-project/sglang
pr: 21019
title: '[Qwen3.5] Fuse split/reshape/cat ops in GDN projection with Triton kernel'
author: yuan-luo
date: '2026-03-23'
url: https://github.com/sgl-project/sglang/pull/21019
source_category: upstream-code
architectures:
- sm100
tags:
- kernel-fusion
techniques:
- kernel-fusion
hardware_features: []
kernel_types: []
languages:
- python
- triton
captured_at: '2026-04-17'
status: merged
merge_sha: 5bdc07d974f6cf236fa765a685453ea5e587a838
inclusion_reason: kernel file changes
changed_paths:
- python/sglang/jit_kernel/triton/gdn_fused_proj.py
- python/sglang/srt/models/qwen3_5.py
- python/sglang/srt/models/qwen3_next.py
artifact_dir: evidence/pull-bundles/sglang/gh-21019
head_ref_oid: 1b0fa5f87fb0b776ad044838e37aa57b02062c8a
---
# [Qwen3.5] Fuse split/reshape/cat ops in GDN projection with Triton kernel

- Repository: `sgl-project/sglang`
- PR: [21019](https://github.com/sgl-project/sglang/pull/21019)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `python/sglang/jit_kernel/triton/gdn_fused_proj.py`
- `python/sglang/srt/models/qwen3_5.py`
- `python/sglang/srt/models/qwen3_next.py`

## Evidence Bundle

`evidence/pull-bundles/sglang/gh-21019`
