adding vscript based perf test

Author: dwr-psandhu

perftest/vscript_read_large_file.py

@@ -0,0 +1,16 @@
+import vutils
+import datetime
+if __name__=='__main__':
+    print('Uses Vista which wraps lowlevel HEC DSSVue functions')
+    d=vutils.opendss('ITP_PP_out_ec.dss')
+    s=datetime.datetime.now()
+    npaths=len(d) # Used to load the catalog into memory
+    print('Catalog read in %s'%str(datetime.datetime.now()-s))
+    print('Reading data from %s pathnames'%str(npaths))
+    s=datetime.datetime.now()
+    for ref in d:
+        s1=datetime.datetime.now()
+        data=ref.getData()
+        path=ref.getPathname()
+        print('Read %s in %s '%(str(path), str(datetime.datetime.now()-s1)))
+    print('Read %s in  %s'%(npaths,str(datetime.datetime.now()-s)))