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README.md

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 # fpng
 fpng is a very fast C++ .PNG image reader/writer for 24/32bpp images. fpng.cpp was written to see just how fast you can write .PNG's without sacrificing too much compression. The files written by fpng conform to the [PNG standard](https://www.w3.org/TR/PNG/), are readable using any PNG decoder, and validate successfully using [pngcheck](https://www.w3.org/TR/PNG/). PNG files written using fpng can also be read using fpng significantly faster than other PNG libraries, due to its explicit use of [Length-Limited Prefix Codes](https://create.stephan-brumme.com/length-limited-prefix-codes/) and an optimized decoder that exploits the properties of these codes.
 
-fpng.cpp compression compared to stb_image_write.h: 12-19x faster with roughly 5-11% avg. smaller files.
+fpng.cpp compression compared to stb_image_write.h: 12-19x faster with roughly 5-11% avg. smaller files. 
 
 fpng.cpp decompression compared to stb_image.h: 2.5-3x faster
 
+fpng.cpp compared to libpng: ~23x faster compression, ~2.5-3x faster decompression
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 Here's an example image encoded by fpng (a downsampled version of "bridge" from [here](http://imagecompression.info/test_images/)):
 ![fpng encoded "bridge" image](https://github.com/richgel999/fpng/blob/main/example.png)