Add perf tests

tox.ini

@@ -51,6 +51,15 @@ commands =
     pycobertura show --format html --source openvixdisklib \
         coverage.xml -o coverage.html
 
+[testenv:perf]
+description = Compare openvixdisklib and VDDK I/O throughput against the lab.
+sitepackages = True
+usedevelop = True
+setenv =
+    {[testenv:integration]setenv}
+commands =
+    python -m pytest -v -s tests/perf/ {posargs}
+
 [testenv:fmt]
 description = Format the code based on the coding style standards.
 deps =