Optimizing external class array

There are a couple of confusing points in your post.

 

 

First, are you talking about and external class/datagroup? I would assume so, since that's currently the only way to pull in external data to an iRule (well, not entirely as a separate virtual could be configured solely for the purpose of updating a Tcl Array).

 

 

Second, Tcl Array's and F5 classes are not the same. Both are similar in that they are implemented on hash maps, but also very different. Tcl Array's use a hashmap to index a value stored in the array. F5 classes generally are used to merely indicate whether something exists though there are a number of people who use them like Arrays. I can only assume your doing the latter???

 

 

Lastly, no there is not a way to influence the initial allocated size of either a Tcl Array or an F5 class.

 

 

Also, when are you experiencing the CPU impact. Is it during an update to the class (assuming that's what you are using), or is it while accessing the class?

 

 

Perhaps whatever you're doing would be better done with a Tcl Array, we'd just have to overcome the different challenges of how to initialize and manage that array.