optimise some memroy reallocations #5

	name: XGBoost CI (misc)

	on: [push, pull_request]

	permissions:
	contents: read # to fetch code (actions/checkout)

	concurrency:
	group: ${{ github.workflow }}-${{ github.event.pull_request.number \|\| github.ref }}
	cancel-in-progress: true

	env:
	BRANCH_NAME: >-
	${{ github.event.pull_request.number && 'PR-' }}${{ github.event.pull_request.number \|\| github.ref_name }}

	jobs:
	gtest-cpu-nonomp:
	name: Test Google C++ unittest (CPU Non-OMP)
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	with:
	submodules: 'true'
	- name: Install system packages
	run: \|
	sudo apt-get install -y --no-install-recommends ninja-build
	- name: Build and test XGBoost
	run: bash ops/pipeline/build-test-cpu-nonomp.sh

	c-api-demo:
	name: Test installing XGBoost lib + building the C API demo
	runs-on: ubuntu-latest
	defaults:
	run:
	shell: bash -l {0}
	steps:
	- uses: actions/checkout@v4
	with:
	submodules: 'true'
	- uses: dmlc/xgboost-devops/actions/miniforge-setup@main
	with:
	environment-name: cpp_test
	environment-file: ops/conda_env/cpp_test.yml
	- name: Build and run C API demo with shared
	run: bash ops/pipeline/test-c-api-demo.sh

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