Add plain benchmark script

benchmark.py

+import json
+
+from search_index import TitleFocusSearchIndex
+
+INDEX_DIR = "benchmark_index"
+BENCHMARK_DATA_DIR = "benchmark_data"
+
+Index = TitleFocusSearchIndex
+
+
+def run_case(case_spec):
+    print(case_spec)
+
+
+if __name__ == '__main__':
+    with open('benchmark_data/meta.json') as json_file:
+        data = json.load(json_file)
+    for case in data["cases"]:
+        print("RUNNING CASE: {}".format(case["name"]))
+        run_case(case)