Stylish

Stylish is heavily based upon the ESLint Stylish formatter.

With errors

Shell

http://example.com — http://www.webpagetest.org/results.php?test=160301_S3_1F0H
    error  'SpeedIndex' is 5617 should be less than 2000  SpeedIndex
  warning  'requestsDoc' is 57 should be less than 30     requestsDoc
    error  'responses_404' is 1 should be 0               responses_404

✖ 3 problems (2 errors, 1 warning)

With too many warnings

Shell

http://example.com — http://www.webpagetest.org/results.php?test=160301_S3_1F0H
  warning  'SpeedIndex' is 5617 should be less than 2000  SpeedIndex
  warning  'requestsDoc' is 57 should be less than 30     requestsDoc
  warning  'responses_404' is 1 should be 0               responses_404

✖ 3 problems (0 errors, 3 warnings)

PerfLint found too many warnings (maximum: 1).