PNG is not cheap on the compression side, due to the lossless coder. It's a little better to decompress: Some benchmarks on iPhone 6 are here: https://browser.

PNG is not cheap on the compression side, due to the lossless coder. It's a little better to decompress: Some benchmarks on iPhone 6 are here: https://browser.primatelabs.com/geekbench3/4423501 https://browser.primatelabs.com/geekbench3/4423501 e.g., JPEG is 15x faster to compress and 2.5x faster to decompress.