slapper

Simple load testing tool with real-time updated histogram of request timings

Interface

Usage

$ ./slapper -help
Usage of ./slapper:
  -H value
        HTTP header 'key: value' set on all requests. Repeat for more than one header.
  -base64body
        Bodies in targets file are base64-encoded
  -maxY duration
        max on Y axe (default 100ms)
  -minY duration
        min on Y axe (default 0ms)
  -rate uint
        Requests per second (default 50)
  -targets string
        Targets file
  -timeout duration
        Requests timeout (default 30s)
  -workers uint
        Number of workers (default 8)

Key bindings

• q, ctrl-c - quit
• r - reset stats
• k - increase rate by 100 RPS
• j - decrease rate by 100 RPS

Targets syntax

The targets file is line-based. Its syntax is:

HTTP_METHOD url
$ body

The body line is optional. The rules for what is considered to be a body line are:

1. If something starts with $ (dollar-sign and space), it's a body
2. If the line is literally {}, it's an empty body

A missing body line is taken to mean an empty request body. Point (2) is there for backwards-compatibility.

Acknowledgement

• Idea and initial implementation is by @sparky
• This module was originally developed for Booking.com.