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soberstadt/boot_profile.rb

Last active September 24, 2025 01:42
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Rails boot profiling
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boot_profile.rb
require 'bundler/inline'
gemfile do
source 'https://rubygems.org'
gem 'stackprof'
end
profile = StackProf.run(raw: true) do
require_relative "config/environment"
ActiveRecord::Base.connection.verify!
end
File.write('tmp/stackprof.json', JSON.generate(profile))
# open tmp/stackprof.json in https://www.speedscope.app/
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soberstadt commented Sep 24, 2025

Save this file in the root of your rails app. Run it with ruby boot_profile.rb.

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