Merge remote-tracking branch 'origin/pr/3509'

qutebrowser/misc/sql.py

@@ -115,6 +115,11 @@ def init(db_path):
         raise SqliteError("Failed to open sqlite database at {}: {}"
                           .format(db_path, error.text()), error)
 
+    # Enable write-ahead-logging and reduce disk write frequency
+    # see https://sqlite.org/pragma.html and issues #2930 and #3507
+    Query("PRAGMA journal_mode=WAL").run()
+    Query("PRAGMA synchronous=NORMAL").run()
+
 
 def close():
     """Close the SQL connection."""