This is where you specify the number
of records that are kept in an internal memory buffer.
The value specified here is
only used if it is equal to or higher than the number of displayed
records. If the value specified is lower, then the value for the
buffer height that is used internally is set to the number of
displayed records.
Especially in multi-record
view (i.e. spreadsheet look), this property can have a strong
(visual) impact on performance.
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