---
id: pr-cccl-cub-7987
repo: NVIDIA/cccl
pr: 7987
title: Implement parallel `cuda::std::unique_copy`
author: miscco
date: '2026-03-12'
url: https://github.com/NVIDIA/cccl/pull/7987
source_category: upstream-code
architectures:
- sm100
tags:
- benchmark kernel
techniques: []
hardware_features: []
kernel_types: []
languages:
- cuda-cpp
captured_at: '2026-05-16'
status: merged
merge_sha: 45853c2f67f9e86f40d552d38a7c41a772122bcb
inclusion_reason: Search-matched CUDA kernel optimization PR; materialize diff/source before synthesis.
changed_paths:
- .github/workflows/blackduck-sca.yml
- libcudacxx/benchmarks/bench/unique_copy/basic.cu
- libcudacxx/include/cuda/std/__pstl/cuda/unique_copy.h
- libcudacxx/include/cuda/std/__pstl/dispatch.h
- libcudacxx/include/cuda/std/__pstl/unique_copy.h
- libcudacxx/include/cuda/std/__pstl_algorithm
- libcudacxx/test/libcudacxx/std/algorithms/alg.modifying/alg.unique/pstl_unique_copy.cu
artifact_dir: evidence/pull-bundles/cccl-cub/gh-7987
head_ref_oid: ca3f9da44dedcc57fd9c97b5914e662afb879dc9
---
# Implement parallel `cuda::std::unique_copy`

- Repository: `NVIDIA/cccl`
- PR: [7987](https://github.com/NVIDIA/cccl/pull/7987)
- Decision: `Search-matched CUDA kernel optimization PR; materialize diff/source before synthesis.`
- Reason: Search-matched CUDA kernel optimization PR; materialize diff/source before synthesis.

## Changed Paths

- `.github/workflows/blackduck-sca.yml`
- `libcudacxx/benchmarks/bench/unique_copy/basic.cu`
- `libcudacxx/include/cuda/std/__pstl/cuda/unique_copy.h`
- `libcudacxx/include/cuda/std/__pstl/dispatch.h`
- `libcudacxx/include/cuda/std/__pstl/unique_copy.h`
- `libcudacxx/include/cuda/std/__pstl_algorithm`
- `libcudacxx/test/libcudacxx/std/algorithms/alg.modifying/alg.unique/pstl_unique_copy.cu`

## Evidence Bundle

`evidence/pull-bundles/cccl-cub/gh-7987`
