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|
require_relative "helper"
1000.times do |i|
RSpec.describe "group #{i}" do
it "has one example" do
end
end
end
benchmark_allocations(burn: 0, min_allocations: 50) do
RSpec::Core::Runner.run([])
end
__END__
Before optimization:
class_plus count
----------------------------------------------------------------------------------------------- -----
Array<Symbol> 26021
String 21331
Array 19402
Array<Symbol,Proc> 6001
Array<RSpec::Core::Example> 6001
RSpec::Core::Hooks::HookCollection 4004
Array<Class> 4004
Hash 3098
Proc 3096
RubyVM::Env 3056
Time 2002
Random 2001
RSpec::Core::Hooks::AroundHookCollection 2000
RSpec::Core::Notifications::GroupNotification 2000
RSpec::Core::Notifications::ExampleNotification 2000
RSpec::Core::Hooks::GroupHookCollection 2000
Array<Symbol,TrueClass> 1003
Array<Class,Module> 1002
Array<TrueClass> 1002
RSpec::Core::Example::Procsy 1000
RubyVM::InstructionSequence 506
Array<Fixnum,FalseClass> 391
Array<Array> 205
Array<String> 52
After optimization, we allocate 2000 less arrays and 2000 less RSpec::Core::Hooks::HookCollection
instances. That's 2 less of each per example group.
class_plus count
----------------------------------------------------------------------------------------------- -----
Array<Symbol> 26021
String 21331
Array 17400
Array<Symbol,Proc> 6001
Array<RSpec::Core::Example> 6001
Array<Class> 4004
Hash 3098
Proc 3096
RubyVM::Env 3056
RSpec::Core::Hooks::HookCollection 2002
Time 2002
Random 2001
RSpec::Core::Notifications::ExampleNotification 2000
RSpec::Core::Notifications::GroupNotification 2000
RSpec::Core::Hooks::GroupHookCollection 2000
Array<Symbol,TrueClass> 1003
Array<Class,Module> 1002
Array<TrueClass> 1002
RSpec::Core::Example::Procsy 1000
RSpec::Core::Hooks::AroundHookCollection 1000
RubyVM::InstructionSequence 506
Array<Fixnum,FalseClass> 391
Array<Array> 205
Array<String> 52
After yet further optimization (where HookCollection instances are only created when hooks are added),
we've reduced allocations significantly further:
class_plus count
----------------------------------------------------------------------------------------------- -----
String 21332
Array 13412
Array<Symbol> 6021
Array<Symbol,Proc> 6001
Array<RSpec::Core::Example> 6001
Hash 3105
Array<Class> 3004
Proc 2101
RubyVM::Env 2061
Time 2002
Random 2001
RSpec::Core::Notifications::GroupNotification 2000
RSpec::Core::Notifications::ExampleNotification 2000
Array<Symbol,TrueClass> 1003
Array<Class,Module> 1002
Array<TrueClass> 1002
RubyVM::InstructionSequence 506
Array<Fixnum,FalseClass> 391
Array<Array> 208
Array<String> 52
|
