$ time ./try_advisory_lock
Waiting
[5] Done, processed 1274 rows.
[7] Done, processed 1236 rows.
[2] Done, processed 1252 rows.
[4] Done, processed 1237 rows.
[8] Done, processed 1257 rows.
[6] Done, processed 1257 rows.
[3] Done, processed 1244 rows.
[1] Done, processed 1243 rows.
Done!

real	0m1.228s
user	0m1.104s
sys	0m1.024s
$ time ./skip_locked
Waiting
[5] Done, processed 1233 rows.
[7] Done, processed 1273 rows.
[8] Done, processed 1260 rows.
[6] Done, processed 1249 rows.
[1] Done, processed 1228 rows.
[4] Done, processed 1306 rows.
[2] Done, processed 1220 rows.
[3] Done, processed 1231 rows.
Done!

real	0m1.146s
user	0m1.008s
sys	0m1.072s