Why Gulp minimizes the image?

Installed Gulp + imagemin, pngquant. Drove three .jpg-images with a total weight of >10Mb. The result:
gulp-imagemin: Minified 3 images (saved 673 B - 0%)
As it should be?
June 5th 19 at 21:41
3 answers
June 5th 19 at 21:43
Why gulp-imagemin does not compress the files?

in General settings, dig deeper, or spread code with your settings.
June 5th 19 at 21:45
gulp.task('img', function() {
 return gulp.src('app/img/**/*') // Get all images from the app
 .pipe(imagemin({ // press them with the best settings
 interlaced: true,
 progressive: true,
 svgoPlugins: [{removeViewBox: false}],
 use: [pngquant()]
}))
 .pipe(gulp.dest('dist/img')); // Paged on production
});
June 5th 19 at 21:47
It seems that images are already optimized, try to run other
So, especially with the iPhone threw a picture, and almost the same result. And the previous was with pixabaj. - Euna_Brakus65 commented on June 5th 19 at 21:50
and I understand that they still need before doing this through photoshop to get rid of the "save for web..."? I just thought that the plugin needs to do everything himself - Euna_Brakus65 commented on June 5th 19 at 21:53

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