jpegoptim has lossless and lossy modes. In lossless mode it preserves all pixels, but it doesn't preserve the file itself. Lossless jpegoptim is comparable to L

jpegoptim has lossless and lossy modes. In lossless mode it preserves all pixels, but it doesn't preserve the file itself. Lossless jpegoptim is comparable to Lepton. In general, Lepton can tends to give better improvements, because it uses a different output file format. How much better depends on your input files, you should try both. I'd say 22% for Lepton and 5% for jpegoptim, based on fading past memories of mine.