discourse/script/boot_mem.rb

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# simple script to measure memory at boot
if ENV['RAILS_ENV'] != "production"
exec "RAILS_ENV=production ruby #{__FILE__}"
end
require 'memory_profiler'
MemoryProfiler.report do
require File.expand_path("../../config/environment", __FILE__)
Rails.application.routes.recognize_path('abc') rescue nil
# load up the yaml for the localization bits, in master process
I18n.t(:posts)
# load up all models and schema
(ActiveRecord::Base.connection.tables - %w[schema_migrations versions]).each do |table|
table.classify.constantize.first rescue nil
end
end.pretty_print