Support slash command /benchmark in PRs

.github/workflows/benchmarks.yml

@@ -17,6 +17,9 @@ on:
   # `workflow_dispatch` allows CodSpeed to trigger backtest
   # performance analysis in order to generate initial data.
   workflow_dispatch:
+  # support slash command
+  repository_dispatch:
+    types: [benchmark-command]
   release:
     types:
       - published
@@ -37,10 +40,22 @@ jobs:
       # Checkout current git repository
       - name: Checkout
         uses: actions/checkout@v4.1.1
+        if: github.event_name != 'repository_dispatch'
         with:
           # fetch all history so that setuptools-scm works
           fetch-depth: 0
 
+      # Checkout the pull request branch
+      - name: Checkout
+        uses: actions/checkout@v4.1.1
+        if: github.event_name == 'repository_dispatch'
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          repository: ${{ github.event.client_payload.pull_request.head.repo.full_name }}
+          ref: ${{ github.event.client_payload.pull_request.head.ref }}
+          # fetch all history so that setuptools-scm works
+          fetch-depth: 0
+
       # Install Miniconda with conda-forge dependencies
       - name: Setup Miniconda
         uses: conda-incubator/setup-miniconda@v3.0.1

.github/workflows/slash-command-dispatch.yml

@@ -1,6 +1,10 @@
 # Support slash commands in pull requests
 #
-# Currently, two slash commands `format` and `test-gmt-dev` are supported.
+# Supported slash commands:
+#
+# - `/benchmark`
+# - `/format`
+# - `/test-gmt-dev`
 #
 name: Slash Command Dispatch
 on:
@@ -18,6 +22,7 @@ jobs:
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
           commands: |
+            benchmark
             format
             test-gmt-dev
           issue-type: pull-request