A Go client for latency testing

This client will make HTTP requests to a remote host, capturing the round trip time and calculating measurements to determine variablility.

The measurements captured are:

• 25 Percentile
• 75 Percentile
• 95 Percentile
• 99 Percentile
• 999 Percentile
• Mean
• Standard Deviation
• Min
• Max
• Inter-Quartile range

The following is an example of the reports generated from the captured round trip times.

$ ltc-client -duration 3h -host 10.10.10.10 -port 80 -route med -rate 0.1 -rint 0
Total Requests: 1080
Throttle: 10s
==============================
Results - final
------------------------------
Requests: 1080
Latencies:
	Total:     5.159692077s
	     	   Client	    Fan
			------------	------------
	0.25:	3.862988ms		0
	0.75:	4.164414ms		0
	0.95:	5.466224ms		0
	0.99:	17.764905ms		0
	0.999:	269.887298ms	0

	mean:	4.777492ms		0
	std:	9.204613ms		0
	min:	3.467133ms		0
	max:	289.146555ms	0
	iqr:	301.426us		0
==============================

Along with this report, the capture times are dumped to a file named results.txt. If the rint flag is not set to 0, the dumped times are sorted.

$ ltc-client -h
Usage of ltc-client:
  -apigee=false: Use an apigee request
  -config="config.json": Location of config file
  -duration=1s: Duration of the test
  -fan=false: Report fan in final results
  -host="localhost": The host of the server
  -https=false: Use https as the transfer protocol.
  -nonce=false: Use a nonce for each request
  -port="8080": The port of the host server
  -rate=1: Requests per second
  -rint=15m0s: Interval to print reports
  -route="small": The route to call on the server (small|med|large|xlarge)

A boolean flag to indicate whether a request through apigee is required.

If this flag is set to true, then a config file that contains apigee information is required. The following is an example of the apigee content required in the config file.

{
	"apigee": {
		"email": "...",
		"password": "...",
		"apikey": "...",
		"apiurl": "..."
	}
}

The location of the config file. The default location is the location where the command is run, where the default config file name is config.json

Note: The config file is only required if apigee is set to true.

The amount of time that the test should run. The time formats used are based on the GoLang's time.Duration The following format are acceptable:

1h - 1 hour
1m - 1 minute
1s - 1 second
1ms - 1 millisecond
1us - 1 microsecond
1ns - 1 nanosecond

In the case where the HTTP request is made to an ltc-mid server, then the -fan flag will indicate that a fan report should be calculated.

The host that should be used for HTTP requests.

A boolean flag to indicate whether the protocal used for the HTTP request should be HTTPS.

A boolean flag to indicate whether a unique value should be appended to the HTTP request to help prevent caching.

The port to be used when making HTTP requests.

The number of requests to make per second. This can also be indicated as a fraction to run requests at a rate greater than 1 second.

0.1 - 1 request every 10 seconds
10  - 10 requests per second

The rint flag is used to indicate how often an updated report should be printed. This flag will force intermediate reported to be printed to the console. Note: Set this flag to 0 to disable intermediate reports.

The route to call on the host. This will resolve to http://localhost:8080/small.