tests: Optimize run-tests.py --prefill-tests startup time

It took significant part of the startup latency to prefill the database
with test cases due to the SQL COMMIT operation between each added row.
Move COMMIT to outside the loop to speed startup significantly.

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>

tests/hwsim/run-tests.py

@@ -76,7 +76,8 @@ def add_log_file(conn, test, run, type, path):
         print "sqlite: " + str(e)
         print "sql: %r" % (params, )
 
-def report(conn, prefill, build, commit, run, test, result, duration, logdir):
+def report(conn, prefill, build, commit, run, test, result, duration, logdir,
+           sql_commit=True):
     if conn:
         if not build:
             build = ''
@@ -88,7 +89,8 @@ def report(conn, prefill, build, commit, run, test, result, duration, logdir):
         params = (test, result, run, time.time(), duration, build, commit)
         try:
             conn.execute(sql, params)
-            conn.commit()
+            if sql_commit:
+                conn.commit()
         except Exception, e:
             print "sqlite: " + str(e)
             print "sql: %r" % (params, )
@@ -329,7 +331,8 @@ def main():
         for t in tests_to_run:
             name = t.__name__.replace('test_', '', 1)
             report(conn, False, args.build, args.commit, run, name, 'NOTRUN', 0,
-                   args.logdir)
+                   args.logdir, sql_commit=False)
+        conn.commit()
 
     if args.split:
         vals = args.split.split('/')