What do you think of my cloaking method?

I use a different cloaking method then what you share here . Gimme input !

[MrPersonMan]

I do like this . I watch for user agents . Once I see googlebot i wrote a script that queries whois . All queries are cached so I don't have to query every time that IP is used .
Then I see the netname . If it's GOGL it's google , if it's YAHOO*** or INKT it's yahoo and MSFT or MSHOTM it's microsoft .

Once I confirm the scripts adds an extra variable if bot and it's id and then i use it through out my site .

What do you think of this against IP ranges?
Any input is most welcome .

[ogletree]

Doesn't that slow down your site.

[MrPersonMan]

I cache queries . And up to know I only gathered about 15+ IP ranges .
The answer is : not at all :)

And I only query those that qualify with their user agent name . Not everyone .