ci: add ci steps for running benchmark tests

Added third party gh-action for A/B testing
of performance degradation.

Follows up #122

Author: vr009

.github/workflows/testing.yml

@@ -44,3 +44,26 @@ jobs:
 
       - name: Run tests
         run: make test
+
+      - name: Run becnchmark
+        run: |
+          make bench > new.txt
+          git checkout master
+          make bench > old.txt
+          go benchcmp new.txt old.txt
+
+#      - uses: WillAbides/benchdiff-action@v0
+#        with:
+#          benchdiff_version: 0.6.2
+#          status_name: test-bench-result
+#          status_on_degraded: neutral
+#          benchdiff_args: |
+#            --bench="."
+#            --count=10
+#            --warmup-count=1
+#            --benchtime=500ms
+#            --base-ref master
+#            --debug
+#            --benchstat-output=markdown
+#            --tolerance=50
+#            --clear-cache