(coauthor here) The 0.7 megapixels/sec is PNG decode (to get input)+encoding+decoding+PNG encoding (to get output we can visualize in a browser) speed. Thank

(coauthor here) The 0.7 megapixels/sec is PNG decode (to get input)+encoding+decoding+PNG encoding (to get output we can visualize in a browser) speed. Thanks for your kind comment!