change caching setup and comment both artifiacts

.github/workflows/sftp-benchmark.yml

@@ -83,18 +83,20 @@ jobs:
         run: make
 
       - name: Get Saved OpenSSH Upload Results
-        uses: actions/download-artifact@v4
-        continue-on-error: true
+        id: cache-upload
+        uses: actions/cache@v4
         with:
-          name: openssh-average-download.csv
           path: wolfssh/openssh-average-download.csv
+          key: openssh-average-download.csv
+          fail-on-cache-miss: false
 
       - name: Get Saved OpenSSH Download Results
-        uses: actions/download-artifact@v4
-        continue-on-error: true
+        id: cache-download
+        uses: actions/cache@v4
         with:
-          name: openssh-average-upload.csv
           path: wolfssh/openssh-average-upload.csv
+          key: openssh-averavge-upload.csv
+          fail-on-cache-miss: false
 
       - name: Install gnuplot
         run: sudo apt-get install gnuplot
@@ -139,34 +141,38 @@ jobs:
           retention-days: 2
 
       - name: Upload OpenSSH Download Results
-        if: steps.download-artifact.outputs.found != 'true'
-        uses: actions/upload-artifact@v4
+        if: steps.cache-download.outputs.cache-hit != 'true'
+        uses: actions/cache@v4
         with:
-          name: openssh-average-upload.csv
-          path: wolfssh/openssh-average-upload.csv
+          path: wolfssh/openssh-average-download.csv
+          key: openssh-average-download.csv
 
       - name: Upload OpenSSH Upload Results
-        if: steps.download-artifact.outputs.found != 'true'
-        uses: actions/upload-artifact@v4
+        if: steps.cache-upload.outputs.cache-hit != 'true'
+        uses: actions/cache@v4
         with:
-          name: openssh-average-download.csv
-          path: wolfssh/openssh-average-download.csv
+          path: wolfssh/openssh-average-upload.csv
+          key: openssh-average-upload.csv
 
       - name: Comment on PR about performance
         env:
+          GITHUB_URL: ${{ github.event.pull_request.comments_url }}
           GH_TOKEN: ${{ github.token }}
           PR_NUMBER: ${{ github.event.pull_request.number }}
+          RUN_ID: ${{ github.run_id }}
         run: |
-          # Get the artifact URL
-          ARTIFACT_ID=$(gh api repos/${{ github.repository }}/actions/artifacts \
-            --jq '.artifacts[0].id')
+          # Get both artifact IDs
+          DOWNLOAD_ARTIFACT=$(gh api repos/${{ github.repository }}/actions/artifacts \
+            --jq '.artifacts[] | select(.name | contains("download-results-pr")) | .id')
+          UPLOAD_ARTIFACT=$(gh api repos/${{ github.repository }}/actions/artifacts \
+            --jq '.artifacts[] | select(.name | contains("upload-results-pr")) | .id')
 
           # Create the comment with direct link to download
           curl -X POST \
-            -H "Authorization: Bearer ${{ github.token }}" \
-            -H "Accept: application/vnd.github.v3+json" \
-            "https://api.github.com/repos/${{ github.repository }}/pulls/$PR_NUMBER/comments" \
-            -d "{\"body\":\"Graphs have been generated and are available in the [workflow artifacts](https://github.com/${{ github.repository }}/actions/artifacts/$ARTIFACT_ID)\"}"
+            $GITHUB_URL \
+            -H "Content-Type: application/json" \
+            -H "Authorization: token $GITHUB_TOKEN" \
+            -d "{\"body\":\"Performance test results:\n\n- [Download Results](https://github.com/${{ github.repository }}/actions/runs/$RUN_ID/artifacts/$DOWNLOAD_ARTIFACT)\n- [Upload Results](https://github.com/${{ github.repository }}/actions/runs/$RUN_ID/artifacts/$UPLOAD_ARTIFACT)\"}"
 
       - name: Print logs if failed
         working-directory: ./wolfssh/