What is Ruby Profiler and how can I use it?

What is Ruby Profiler and how can I use it?

Ruby Profiler is a tool that helps you analyze the performance of your Ruby applications by providing detailed reports on method calls and execution time.

How do I install Ruby Profiler?

You can install Ruby Profiler by adding it to your Gemfile with gem 'ruby-prof' and then running bundle install.

Can you show me an example of how to use it in my code?

Sure! You can use it like this:

require 'ruby-prof'

RubyProf.measure_mode = RubyProf::WALL_TIME

result = RubyProf.profile do
  # Your code here
end

printer = RubyProf::GraphHtmlPrinter.new(result)
printer.print(File.open('profile.html', 'w'))

What kind of output can I expect from Ruby Profiler?

You can expect a detailed report showing the time spent in each method, which helps identify bottlenecks in your code.