Times are approximate, they correspond with a telephone modem at 56 kbits/s

This is JPEG, not JPEG 2000

Quality 75, size 58771 bytes, time 9.4 s

Quality 50, size 38997 bytes, time 6.3 s

Quality 40, size 33494 bytes, time 5.4 s

Quality 30, size 26994 bytes, time 4.3 s

Quality 20, size 20310 bytes, time 3.3 s

Quality 15, size 14936 bytes, time 2.4 s

Quality 10, size 10932 bytes, time 1.8 s

Quality 7, size 7685 bytes, time 1.2 s

Quality 5, size 5410 bytes, time 0.9 s