1.testimage.jpg
Before: 197.1 KB
After: 18.4 KB
Saved: 178.7 KB
Reduce: 91%

2.testimage.png
Before: 115.5 KB
After: 30.4 KB
Saved: 85.1 KB
Reduce: 74%

Own results:
pngcrush: 40% Size: 68909
pngout: 26% Size: 85361
optipng: 21% Size: 91182
pngcrush: 18% Size: 94181

