Use micromamba in ASV benchmark workflow (#6926)

* Use micromamba in asv workflow

* asv in extra-specs and cache environment key

* Update .github/workflows/benchmarks.yml

Co-authored-by: Deepak Cherian <[email protected]>

Co-authored-by: Deepak Cherian <[email protected]>

Author: Illviljan

.github/workflows/benchmarks.yml

@@ -12,6 +12,7 @@ jobs:
     runs-on: ubuntu-20.04
     env:
       ASV_DIR: "./asv_bench"
+      CONDA_ENV_FILE: ci/requirements/environment.yml
 
     steps:
       # We need the full repo to avoid this issue
@@ -20,17 +21,16 @@ jobs:
         with:
           fetch-depth: 0
 
-      - name: Setup Miniconda
-        uses: conda-incubator/setup-miniconda@v2
+      - name: Set up conda environment
+        uses: mamba-org/provision-with-micromamba@v12
         with:
-          # installer-url: https://github.com/conda-forge/miniforge/releases/latest/download/Mambaforge-Linux-x86_64.sh
-          installer-url: https://github.com/conda-forge/miniforge/releases/latest/download/Miniforge3-Linux-x86_64.sh
+          environment-file: ${{env.CONDA_ENV_FILE}}
+          environment-name: xarray-tests
+          cache-env: true
+          cache-env-key: "${{runner.os}}-${{runner.arch}}-py${{env.PYTHON_VERSION}}-${{env.TODAY}}-${{hashFiles(env.CONDA_ENV_FILE)}}-benchmark"
+          extra-specs: |
+            asv
 
-      - name: Setup some dependencies
-        shell: bash -l {0}
-        run: |
-          pip install asv
-          sudo apt-get update -y
 
       - name: Run benchmarks
         shell: bash -l {0}