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 +44,28 @@ jobs:
 
       - name: Run tests
         run: make test
+
+      - name: Run becnchmark
+        run: |
+          make bench
+
+      - name: AB performance
+        run: |
+          go get golang.org/x/tools/cmd/benchcmp
+          make bench > b.txt && git fetch && git checkout master
+          go test -bench=. -benchmem -benchtime=1s -cpu=4 > a.txt
+          benchcmp a.txt b.txt
+
+#      - uses: WillAbides/benchdiff-action@v0
+#        with:
+#          benchdiff_version: 0.6.2
+#          status_name: test-bench-result
+#          status_on_degraded: neutral
+#          benchdiff_args: |
+#            --base-ref=master
+#            --cpu=1
+#            --count=5
+#            --warmup-count=1
+#            --tolerance=30
+#            --benchmem
+#            --debug