>Some documentation (hackers guide) say dat including a tag on
>deleted() records in a table increase performance in SQL select queries.
>
>However in Foxpro Advisor there was an article that it can also slow down queries.
>
>Has anyone tested this,
>
>Please advise

Piet,]

yes, the person who wrote the artile in advisor and the folks who wrote Hacker's Guide both tested it and they both are right. This is not a simple question. Hasve you read the article? It explains the situation in quite good detail.