Too Active
A tool for understanding if you're using Active Record too actively.
Profiling
TooActive
is quite simple: you pass a block to TooActive.profile
and then inspect the events that occurred
as the block is executed.
TooActive.profile do
MyModel.all.each do |model|
puts model.relationships.map(&:id)
end
end
TooActive.profile do
MyModel.includes(:relationships).each do |model|
puts model.relationships.map(&:id)
end
end
It does this by subscribing to event using ActiveSupport::Notifications
.
Currently, TooActive
only supports sql.active_record
events, which are fired when a SQL query is executed.
Installation
Install the gem in your Gemfile
using bundler, or by building it locally.
# Gemfile
gem 'too_active', git: 'git@github.com:thelowlypeon/too_active'
If you add it to your Gemfile, you'll probably want to do so only in your test or development environments:
# Gemfile
group :development, :test do
gem 'too_active', git: 'git@github.com:thelowlypeon/too_active'
end
Usage
Pass any block into profile
:
events = TooActive.profile(analyze: false) { my_potentially_expensive_block }
puts events.count # => lots!
TooActive.profile { my_potentially_expensive_block } # => prints analysis
Note: This currently only analyzes active record queries and their duration. More to come.