-- OPTION 1: DATA FULLY IMPORTED in temp table
real    0m0.048s
user    0m0.002s
sys     0m0.006s

-- OPTION 2: DATA read via file_fdw (foreign data wrapper)
real    0m0.038s
user    0m0.002s
sys     0m0.006s

-- Your program
real    0m0.051s
user    0m0.048s
sys     0m0.003s