Configuring PerfLint

To configure PerfLint you should add your desired rules into a .perflintrc file. This will set rules for an entire directory and all of its subdirectories.

PerfLint checks the current working directory first as a starting point when looking for a configuration file. Alternatively you could can specify a specific configuration file via the CLI.

Rules

For a list of available rules see the Rules doc.

When setting rules you can specify the parameters to which a check should pass, and also whether that rules should flag as an 'error' or 'warning'.

📘

Check for too many warnings

Setting the maxWarnings parameter in the CLI will allow you to trigger a nonzero exit code if there are too many warnings.

Check if a result is greater than expected

This will check to see if the result is less than the max value specified.

.perflintrc

{
  "rules": {
    "SpeedIndex": [{ "max": 2000 }, "error"]
  }
}

Check if a result is less than expected

This will check to see if the result is less than the min value specified.

.perflintrc

{
  "rules": {
    "requestsJS": [{ "min": 1 }, "warning"]
  }
}

Check if a result is within a range of values

This will check to see if the result is within a range of values, it will validate on max before min.

.perflintrc

{
  "rules": {
    "requestsDoc": [{ "min": 3, "max": 30 }, "warning"]
  }
}

Check if a result matches expected value

This will check to see if a result matches exactly with the value specified.

.perflintrc

{
  "rules": {
    "responses_404": [0, "error"]
  }
}

Test Settings

URL(s)

If the --url parameter is not set in the CLI it must be set in the config.

Single URL

.perflintrc

{
  "URL": "http://example.com",
  "rules": {...}
}

Multiple URLs

.perflintrc

{
  "URL": ["http://example.com", "http://example.com/page2"],
  "rules": {...}
}

Private Test

Define if the test should be hidden from the test log.
Default: false

.perflintrc

{
	"private": true,
  "rules": {...}
}

Test Location

📘

Valid Test Locations

A list of valid locations can be viewed at WebPageTest API Locations.

Define specific test location.
Default: 'Dulles:Chrome'

.perflintrc

{
	"location": "Dulles:Chrome",
  "rules": {...}
}

Test Connectivity

Define connectivity speed to test URL.
Default: 'Cable'

Available Connections

• Cable
• DSL
• FIOS
• Dial
• 3G
• 3GFast
• Native

.perflintrc

{
	"connectivity": "Cable",
  "rules": {...}
}

Test Label

Specify a 'label' for the test.
Default: 'PerfLint Test'

.perflintrc

{
	"label": "Custom Test Label",
  "rules": {...}
}

Result Filters

❗️

Be aware when changing 'average' and 'view'

Not all 'averages' and 'views' have all rules available.

Specify which results are parsed.

.perflintrc

{
	"average": "median",
  "view": "firstView",
  "rules": {...}
}

Default Filters

If no values are specified, the defaults are;
average: 'median'
view: 'firstView'

Available Filters

### 'average'

• average
• standardDeviation
• median

### 'view'

• firstView
• repeatView