Larger (bytes) processed file than original

[Paul-Browne]

Expected Behavior

I expect the processed file size to be less than the original

Current Behavior

The processed file size is greater than the original

Failure Information (for bugs)

Even with .quality(75) and in some cases a smaller size then the original, the processed file is larger in bytes

jimp.read("src/path/to/image.jpg", (err, file) => {
    if (err) {
        console.log(err);
    } else {
        file.resize(400, jimp.AUTO)
            .quality(75)
            .write("public/path/to/image.jpg");
    }
});

• Jimp Version: latest
• Operating System: Mac
• Node version: 12

[AllenZhang34]

@hipstersmoothie I also have this problem. I keep the size same with the original. Only lower the quality. But the size is bigger then Original. code:

var Jimp = require('jimp');

// open a file called "lenna.png"
Jimp.read('test1.jpg', (err, test) => {
  if (err) throw err;
  test
    .resize(944, 320) // resize
    .quality(70) // set JPEG quality
    .write('test1-small.jpg'); // save
});

Could you please help why does it happen? Thanks a lot!