Sweter

Simple web performance reporter with scheduling and ElasticSearch support. Sweter uses phantomas under the hood and reports timeToFirstByte, domInteractive and domComplete timings.

Installation

npm install -g sweter

Usage

$ sweter --help

  Usage
    sweter <url> [options]

  Example
    sweter allegro.pl --runs 1067

  Options
    --runs       number of tests to be performed
    --timeout    timeout for single test run, defaults to 30s
    --reporter   console (default), elastic, stats or json
    --schedule   schedule in cron format "* * * * * *"
    --daemonize  daemonize a process

  Elastic options
    --elastic-host    elastic host
    --elastic-index   elastic index

Reporters

Console reporter

By default Sweter outputs data to console

$ sweter google.com

Sat, 04 Apr 2015 10:40:01 GMT
  timeToFirstByte: 139
  domInteractive: 293
  domComplete: 664

Stats reporter

$ sweter google.com --reporter stats

{
  "date":"2015-07-29T12:54:20.403Z",
  "timeToFirstByte": { "median":0.25 },
  "domInteractive":  { "median":0.7  },
  "domComplete":     { "median":1.79 }
}

JSON reporter

$ sweter google.com --reporter json

{"timeToFirstByte":329,"domInteractive":610,"domComplete":1557}

Elastic reporter

Sweter can feed Elastic instance

$ sweter google.com \
    --reporter elastic \
    --elastic-host localhost \
    --elastic-index sweter

$ curl http://localhost:9200/sweter/_search
{
  "_index": "sweter",
  "_type": "object",
  "_id": "AUyLZuLrG92aw_Xb4w3P",
  "_score": 1,
  "_source": {
    "timestamp": 1428267917998,
    "metrics": {
      "timeToFirstByte": 365,
      "domInteractive": 764,
      "domComplete": 3890
    }
  }
}

Custom reporters

You can write your own reporter if you want. See https://github.com/msn0/sweter-custom-reporter as an example and use it this way

$ sweter google.com --reporter sweter-custom-reporter

So, assuming your node module name is foo then

$ sweter google.com --reporter foo

If foo requires some additional params then pass them this way

$ sweter google.com \
    --reporter foo \
    --foo-param1 "my param" \
    --foo-param2 777

Examples

Measure google.com performance every day at 1:00AM and send data to ElasticSearch:

$ sweter google.com \
    --runs 1067 \
    --reporter elastic \
    --elastic-host localhost \
    --elastic-index google \
    --schedule "0 0 1 * * *" \
    --daemonize

Measure google.com performance every four hours and log median to file:

$ sweter google.com \
    --runs 600 \
    --reporter stats \
    --schedule "0 0 */4 * * *" >> report

Debugging

$ DEBUG=* sweter google.com

License

Apache-2.0 © Michał Jezierski