Ajax对網站SEO的影响及优化建议

Another crucial optimization is to avoid N+1 query problems. For example, when displaying the latest threads on the homepage, Discuz might first fetch a list of threads, then for each thread query the last post’s author. Using a JSON cache or pre-computed “latest thread” table that is updated via a cron job can eliminate this overhead. Similarly, the “new posts” feature can be replaced with a Redis sorted set keyed by `lastpost` timestamp, updated via a daemon service that listens to post inserts.