old RI query performance results

note: v5 is with SELECT 1 FROM ONLY fktable x WHERE $1 @> fkcol FOR SHARE OF x;
and v5.1 is with SELECT 1 FROM ONLY fktable x WHERE ARRAY[$1] <@ fkcol FOR SHARE OF x;


+------------------+------------------+---------+
|                    Delete w/o index           |
+------------------+------------------+---------+
| rows in fk table | v5               | V5.1    |
+------------------+------------------+---------+
| 10               | 0.377            | 0.195   |
| 100              | 0.468            | 0.3     |
| 1,000            | 0.784            | 0.948   |
| 10,000           | 5.082            | 5.39    |
| 100,000          | 39.439           | 53.297  |
| 1,000,000        | 387.1042         | 755.755 |
+------------------+------------------+---------+

+------------------+--------------+-------+
|                  | Delete index |       |
+------------------+--------------+-------+
| rows in fk table | v5           | V5.1  |
+------------------+--------------+-------+
| 10               | 0.339        | 0.444 |
| 100              | 0.303        | 0.254 |
| 1,000            | 0.917        | 0.721 |
| 10,000           | 4.148        | 5.574 |
| 100,000          | 6.81         | 1.533 |
| 1,000,000        | 14.068       | 7.441 |
+------------------+--------------+-------+

+------------------+------------------+---------+
|                  | Update w/o index |         |
+------------------+------------------+---------+
| rows in fk table | v5               | V5.1    |
+------------------+------------------+---------+
| 10               | 0.412            | 0.369   |
| 100              | 0.444            | 0.422   |
| 1,000            | 0.582            | 1.263   |
| 10,000           | 4.428            | 5.631   |
| 100,000          | 40.0351          | 52.747  |
| 1,000,000        | 408.3397         | 544.776 |
+------------------+------------------+---------+

+------------------+--------------+-------+
|                  | Update index |       |
+------------------+--------------+-------+
| rows in fk table | v5           | V5.1  |
+------------------+--------------+-------+
| 10               | 0.46         | 0.496 |
| 100              | 0.511        | 0.338 |
| 1,000            | 1.16         | 0.781 |
| 10,000           | 5.279        | 5.703 |
| 100,000          | 5.201        | 1.59  |
| 1,000,000        | 13.493       | 7.638 |
+------------------+--------------+-------+