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Run Time
Turn on “Include performance details” to see how fast your report objects are running in edit mode (HTML only): https://www.ibm.com/support/pages/how-include-report-performance-details-report-output
Note: The run options that you set apply only to the current session. When you close Cognos, the options return to the default settings.
Filters
Apply the broadest filter first. This will minimize the number of records Cognos is processing.
In a report using joins or unions apply the filter at the lowest level, in the queries prior to the join/union if possible.
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