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Is there a difference in speed between these two modi?
selectall_arrayref( "SELECT * FROM $table", { Slice => { a => 1, b => 1 } } );
selectall_arrayref( "SELECT a, b FROM $table", { Slice => {} } );
Yes, because the
Sliceis doing post-processing on client side. So latter example will send only columnsaandbin record-set. If there is more columns in the$table, latter call would be less expensive and faster.