The first program, PNGGauntlet(1), uses the PNGOUT utility to optimize PNG files, while the other application, Smush.it(2), uses the pngcrush(3) algorithm. I have put to the test a PNG image with the file size of 439.96 Kb.
| PNG file size(before) | PNG file size(after) | |
|---|---|---|
| Smush.it | 439.96 Kb | 46.46 Kb(89.44% savings) |
The PNG file of 439.96 Kb, optimized by Smush.it, returned a total saving percentage of 89.44 by reducing 395.50 Kb from the original size and resulted in a 46.46 Kb file.
PNGGauntlet has a four options to choose from: Xtreme!, Intense, Longest Match and Huffman only methods.
| Option | PNG file size(before) | Time span(according to Option) | PNG file size(after) |
|---|---|---|---|
| Xtreme! | 439.96 Kb | Slowest | 49.31 Kb(89% savings) |
| Intense | 439.96 Kb | Slow | 49.55 Kb(89% savings) |
| Longest Match | 439.96 Kb | Fast | 55.75 Kb(87% savings) |
| Huffman Only | 439.96 Kb | Faster | 378.30 Kb(14% savings) |
Using PNGGauntlet “Xtreme!” option I obtained from a 439.96 Kb PNG file, a 49.31 Kb one, being saved 89%. Closely, with the “Intense’ method, it gained the same saving percentage of 89, but with a total resulted file size of 49.55 Kb.
The “Longest Match” option optimized and resulted a file size of 55.75 Kb, therefore with a 87% savings, but using the “Huffman Only” option, the 439.96 Kb file turned into a 378.30 Kb, with a 14% of savings.
