Why might gulp-chached not work?

Question

Node.js

I can’t understand what the problem could be, but that when using the .pipe(cache('stylus')) pipe and without it, the build time does not change at all.

gulp.task('stylus', function () {
  return gulp.src('./app/css/*.styl')
    .pipe(cache('stylus'))
    .pipe(stylus({
        use:[rupture(),axis(),jeet()]
        })).on('error', errorhandler)
    .pipe(gulp.dest('./app/css/'))
  
});