discourse/script/boot_mem.rb
Sam c89b42c488 PERF: only require the rss library if used
Before:

Total allocated: 257909321 bytes (2514134 objects)
Total retained:  39681579 bytes (343387 objects)

allocated memory by gem
-----------------------------------
  42875979  rss

retained memory by gem
-----------------------------------
   2080188  rss

retained objects by gem
-----------------------------------
     13052  rss

After:

Total allocated: 210562047 bytes (2252030 objects)
Total retained:  37433816 bytes (328635 objects)

----

So, 2 less megabytes on boot and 13000 objects stuck in ruby heaps forever.
2018-02-15 13:11:33 +11:00

22 lines
589 B
Ruby

# 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