There are some tips we can use to improve performance of reports for Dynamics AX 2012.
Use static reports. The deployment of static reports is described here: http://technet.microsoft.com/en-us/library/hh496446.aspx In this way we will safe several calls to Metadata service to get labels values and correct formatting of dates and numbers.
Install application hotfix KB 2879661 which fix the situation when
first generation of a report after Dynamics AX client restart takes
long. This happens for each user.
Newest kernel. Hotfixes for performance improvement are included in
new kernels that...

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