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Upsun Continuous Profiler is powered by Blackfire. It is available directly from the Console, under Apps and Services → your app → Profiling. The Ruby continuous profiling is currently made across 3 dimensions:
  • CPU Time: Time spent running on the CPU
  • Wall-time: elapsed time per function call
  • Allocations: Time spent running on the CPU
The default sampling frequency is 100 Hz. This means the Ruby continuous profiler is collecting information 100 times per second.

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Prerequisites

Upsun Continuous Profiler requires Ruby >= 2.5.

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Installation

  1. Add the datadog gem to your Gemfile or gems.rb file:
gem 'datadog', '~> 2.0'
  1. Install the gems running the bundle install command.
  2. Add the ddprofrb exec command to your Ruby application start command: 
bundle exec ddprofrb exec ruby myrubyapp.rb
Rails example: 
bundle exec ddprofrb exec bin/rails s
Alternatively, start the profiler by adding the following code in your application’s entry point if you can’t start it using ddprofrb exec: 
require 'datadog/profiling/preload'
Last modified on March 12, 2026