Jozef Chúťka's blog

Here are some benchmark tests for current available PNGEncoders. Sync encoding tested on 2 real bitmap images (500x300px, 256x256px) on Intel Core 2 Duo @ 2.80GHz, win XP:

encoder / image                         500x333 px  256x256 px
by.blooddy.crypto.image.PNG24Encoder     78ms       125ms
dsk.PNGEncoder							140ms		141ms
net.kaourantin.PNGEnc					188ms		187ms
mx.graphics.codec.PNGEncoder			203ms		172ms
com.adobe.images.PNGEncoder				219ms		172ms
org.aswing.image.png.AsPngEncoder		234ms		172ms
ru.inspirit.encoders.png.PNGEncoder		391ms		203ms

by.blooddy.crypto.image.PNG24Encoder worked fastest for me.

download sources:

• by.blooddy.crypto.image.PNG24Encoder
• dsk.PNGEncoder
• net.kaourantin.PNGEnc
• mx.graphics.codec.PNGEncoder
• org.aswing.image.png.AsPngEncoder
• ru.inspirit.encoders.png.PNGEncoder