bson.M and bson.D

[sundar.v...@gmail.com]

Hello,

I understand that the bson.D has an ordered list and it is critical when you query mongodb, that the query is correctly ordered. 

A similar related to bson.D was already asked here:

https://groups.google.com/forum/#!searchin/mgo-users/ordering/mgo-users/cqKN_noUdzE/FMzqVIKl7uAJ

However, when you do an insert of an record, is the order of the list important, for instance will an ordered list be better indexed and accessed by the database.

A more general question is : In which cases should one use bson.D and when to choose bson.M

Thanks,

Sundar