[t0rakka]

Timings with the original test image ( https://www.eso.org/public/archives/print_posters/large/prin... )

9933 x 7016 (7.4 MB)

    load turbojpeg: 309 ms 
    load mango:     225 ms
    save turbojpeg: 388 ms
    save mango:     96 ms

Started with 800 ms save time earlier today but got motivated to finally optimize the encoder; thanks! :)