This AutoComplete implementation points to an online script that serves a data as delimited plain text. Enabling caching on the DataSource can reduce trips to the server and speed performance for repeated queries.
Implementers who are working with data from third-party sources, user input data, or otherwise untrustworthy sources should be sure to read the Security Considerations section of the AutoComplete user guide.
Note: You are viewing this example in debug mode with logging enabled. This can significantly slow performance.
All YUI 2.x users should review the YUI 2.8.2 security bulletin, which discusses a vulnerability present in YUI 2.4.0-2.8.1.