diff --git a/scripts/test_diff.py b/scripts/test_diff.py
new file mode 100644
index 0000000..ffd48d9
--- /dev/null
+++ b/scripts/test_diff.py
@@ -0,0 +1,78 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""
+
+Based on the workflow runner by priyash
+
+
+Read all the JSON files for all the workflows and submit them to two endpoints.
+Save out the status codes, numbers of results, and time information
+
+Currently only handles synchronous queries.
+
+"""
+
+from datetime import datetime
+import json
+import requests
+import os
+from collections import defaultdict
+from os import path
+
+
+def collect_queries(workflows=['A','C','D','B']):
+    '''
+    Here the codes start calling the above functions and submits the queries to ARS
+
+    The below code reads each JSON files from the Workflows A through D (subdirectories).
+    The queries are submitted to ARAX and output is saved in a dictionary, where the key is the file name of
+    the JSON to denote which query is being run and the values assigned to the key is the query id
+
+    '''
+    scriptpath = os.path.dirname(__file__)
+    PATH = os.path.join(scriptpath,'../2021-12_demo')
+    queries = []
+    for workflow in workflows:
+        dir = os.path.join(PATH,f'workflow{workflow}')
+        files = os.listdir(dir)
+        for name in files:
+            if name.endswith((".json")):
+                filename = path.join(dir, name)
+                with open(filename,'r') as inf:
+                    query = json.load(inf)
+                    queries.append( (name,query) )
+    return queries
+
+def run_query(sync_endpoint,query,qname):
+    result = {}
+    start = datetime.now()
+    print(f'Submitting {qname} to {sync_endpoint}')
+    response = requests.post(sync_endpoint,json=query)
+    print('Response')
+    result['endpoint'] = sync_endpoint
+    result['query'] = qname
+    result['status_code'] = response.status_code
+    if response.status_code == 200:
+        try:
+            result['result_count'] = len(response.json()['message']['results'])
+        except:
+            result['result_count'] = 0
+    else:
+        result['result_count'] = 0
+    end = datetime.now()
+    result['timedelta'] = str(end-start)
+    return result
+
+def run_all(endpoints,workflows):
+    queries = collect_queries(workflows)
+    print(f'Collected {len(queries)} queries.')
+    all_results = []
+    for qname,q in queries:
+        for endpoint in endpoints:
+            result = run_query(endpoint,q,qname)
+            all_results.append(result)
+    with open('output_results.json','w') as outf:
+        json.dump(all_results,outf,indent=4)
+
+if __name__ == '__main__':
+    run_all(['https://aragorn.renci.org/1.2/query'],['A'])
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