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Allow memoization when included modules prepend MemoWise and define initialize #327

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7 changes: 4 additions & 3 deletions CHANGELOG.md
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Expand Up @@ -13,8 +13,9 @@ _No breaking changes!_

**Project enhancements:**

- Fixed a bug that overwrote existing self.extended method definitions. [[#324]](https://github.com/panorama-ed/memo_wise/pull/314)
- Fixed a bug that overwrote existing self.inherited method definitions. [[#325]](https://github.com/panorama-ed/memo_wise/pull/315)
- Fixed a bug that overwrote existing `self.extended` method definitions [[#324]](https://github.com/panorama-ed/memo_wise/pull/324)
- Fixed a bug that overwrote existing `self.inherited` method definitions [[#325]](https://github.com/panorama-ed/memo_wise/pull/325)
- Allow memoization when `include`d modules `prepend MemoWise` and define `initialize` [[#327]](https://github.com/panorama-ed/memo_wise/pull/327)

## [v1.8.0](https://github.com/panorama-ed/memo_wise/compare/v1.7.0...v1.8.0) - 2023-10-25

Expand All @@ -27,7 +28,7 @@ _No breaking changes!_
**Project enhancements:**

- Switched RuboCop configuration from `panolint` to `panolint-ruby` [[#312]](https://github.com/panorama-ed/memo_wise/pull/312)
- Updated benchmark results in `README.md` to Ruby 3.2.2 and 2.7.8 [[#313]](https://github.com/panorama-ed/memo_wise/pull/297)
- Updated benchmark results in `README.md` to Ruby 3.2.2 and 2.7.8 [[#313]](https://github.com/panorama-ed/memo_wise/pull/313)
- Updated `Dry::Core` gem version to 1.0.0 in benchmarks [[#297]](https://github.com/panorama-ed/memo_wise/pull/297)
- Updated `Memery` gem version to 1.5.0 in benchmarks [[#313]](https://github.com/panorama-ed/memo_wise/pull/313)
- Updated `Memoized` gem version to 1.1.1 in benchmarks [[#288]](https://github.com/panorama-ed/memo_wise/pull/288)
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40 changes: 20 additions & 20 deletions README.md
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Expand Up @@ -112,21 +112,21 @@ For more usage details, see our detailed [documentation](#documentation).

## Benchmarks

Benchmarks are run in GitHub Actions, and the tables below are updated with every code change. **Values >1.00x represent how much _slower_ each gem’s memoized value retrieval is than the latest commit of `MemoWise`**, according to [`benchmark-ips`](https://github.com/evanphx/benchmark-ips) (2.11.0).
Benchmarks are run in GitHub Actions, and the tables below are updated with every code change. **Values >1.00x represent how much _slower_ each gem’s memoized value retrieval is than the latest commit of `MemoWise`**, according to [`benchmark-ips`](https://github.com/evanphx/benchmark-ips) (2.13.0).

Results using Ruby 3.2.2:
Results using Ruby 3.2.3:

|Method arguments|`Dry::Core`\* (1.0.1)|`Memery` (1.5.0)|
|--|--|--|
|`()` (none)|0.60x|3.58x|
|`(a)`|1.37x|7.41x|
|`(a, b)`|1.20x|6.43x|
|`(a:)`|1.47x|13.60x|
|`(a:, b:)`|1.20x|10.55x|
|`(a, b:)`|1.21x|10.36x|
|`(a, *args)`|0.79x|1.52x|
|`(a:, **kwargs)`|0.77x|2.02x|
|`(a, *args, b:, **kwargs)`|0.69x|1.38x|
|`()` (none)|0.59x|3.51x|
|`(a)`|1.50x|9.02x|
|`(a, b)`|1.21x|7.12x|
|`(a:)`|1.47x|14.54x|
|`(a:, b:)`|1.20x|11.01x|
|`(a, b:)`|1.22x|11.15x|
|`(a, *args)`|0.80x|1.67x|
|`(a:, **kwargs)`|0.77x|2.08x|
|`(a, *args, b:, **kwargs)`|0.68x|1.41x|

\* `Dry::Core`
[may cause incorrect behavior caused by hash collisions](https://github.com/dry-rb/dry-core/issues/63).
Expand All @@ -135,15 +135,15 @@ Results using Ruby 2.7.8 (because these gems raise errors in Ruby 3.x):

|Method arguments|`DDMemoize` (1.0.0)|`Memoist` (0.16.2)|`Memoized` (1.1.1)|`Memoizer` (1.0.3)|
|--|--|--|--|--|
|`()` (none)|22.09x|2.35x|23.72x|2.60x|
|`(a)`|20.98x|14.43x|21.20x|12.20x|
|`(a, b)`|17.45x|12.94x|17.69x|11.13x|
|`(a:)`|29.80x|23.38x|25.17x|21.57x|
|`(a:, b:)`|27.00x|22.26x|23.30x|20.91x|
|`(a, b:)`|25.91x|21.20x|21.88x|19.51x|
|`(a, *args)`|3.07x|2.27x|3.17x|1.95x|
|`(a:, **kwargs)`|2.74x|2.28x|2.51x|2.10x|
|`(a, *args, b:, **kwargs)`|2.14x|1.84x|1.95x|1.72x|
|`()` (none)|23.21x|2.30x|24.10x|2.68x|
|`(a)`|21.81x|14.61x|21.37x|12.07x|
|`(a, b)`|18.87x|13.44x|18.00x|11.58x|
|`(a:)`|29.97x|23.28x|25.77x|21.35x|
|`(a:, b:)`|27.37x|22.26x|23.96x|20.63x|
|`(a, b:)`|26.22x|20.88x|22.13x|19.28x|
|`(a, *args)`|3.23x|2.26x|3.20x|1.98x|
|`(a:, **kwargs)`|2.77x|2.27x|2.54x|2.09x|
|`(a, *args, b:, **kwargs)`|2.18x|1.85x|1.97x|1.74x|

You can run benchmarks yourself with:

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21 changes: 17 additions & 4 deletions lib/memo_wise.rb
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Expand Up @@ -54,10 +54,9 @@ module MemoWise
# [this article](https://www.ruby-lang.org/en/news/2019/12/12/separation-of-positional-and-keyword-arguments-in-ruby-3-0/)
# for more information.
#

# :nocov:
all_args = RUBY_VERSION < "2.7" ? "*" : "..."
# :nocov:
class_eval <<~HEREDOC, __FILE__, __LINE__ + 1
INITIALIZE_LITERAL = <<~HEREDOC.freeze
# On Ruby 2.7 or greater:
#
# def initialize(...)
Expand All @@ -72,11 +71,14 @@ module MemoWise
# super
# end

def initialize(#{all_args})
def initialize(#{RUBY_VERSION < '2.7' ? '*' : '...'})
MemoWise::InternalAPI.create_memo_wise_state!(self)
super
end
HEREDOC
# :nocov:

class_eval(INITIALIZE_LITERAL, __FILE__, __LINE__ + 1)

module CreateMemoWiseStateOnExtended
def extended(base)
Expand All @@ -94,6 +96,15 @@ def inherited(subclass)
end
private_constant(:CreateMemoWiseStateOnInherited)

module CreateMemoWiseStateOnIncluded
def included(base)
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@alpaca-tc in your code example you had an additional conditional here and below. Am I missing the reasoning behind those?

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Basically, I don't want to define unnecessary methods, so I added a branch.

BTW, I found a bug that memo_wise is not initialized when a module is included in a class with an included module.
We can fix this case by simply making the following change, but there may be other edge cases.

Something may need to be done to reduce the complexity.　

diff --git a/spec/memo_wise_spec.rb b/spec/memo_wise_spec.rb
index 6e73d3a..a2355a1 100644
--- a/spec/memo_wise_spec.rb
+++ b/spec/memo_wise_spec.rb
@@ -365,18 +365,32 @@ RSpec.describe MemoWise do
           end
         end
 
+        let(:nested_module_with_initializer) do
+          Module.new do
+            include Module3
+            def initialize(*); end
+          end
+        end
+
         let(:klass_with_module_with_initializer) do
           Class.new do
             include Module3
           end
         end
 
+        let(:klass_with_nested_module_with_initializer) do
+          Class.new do
+            include Module4
+          end
+        end
+
         let(:instance) { klass.new }
 
         before(:each) do
           stub_const("Module1", module1)
           stub_const("Module2", module2)
           stub_const("Module3", module_with_initializer)
+          stub_const("Module4", nested_module_with_initializer)
         end
 
         it "memoizes inherited methods separately" do
@@ -402,6 +416,14 @@ RSpec.describe MemoWise do
           expect(instance.module1_method_counter).to eq(1)
         end
 
+        it "can memoize klass with nested module with initializer" do
+          instance = klass_with_nested_module_with_initializer.new(true)
+          expect { instance.module1_method }.not_to raise_error
+
+          expect(Array.new(4) { instance.module1_method }).to all eq("module1_method")
+          expect(instance.module1_method_counter).to eq(1)
+        end
+
         it "can reset klass with initializer" do
           instance = klass_with_initializer.new(true)
           expect { instance.reset_memo_wise }.not_to raise_error
@@ -411,6 +433,11 @@ RSpec.describe MemoWise do
           instance = klass_with_module_with_initializer.new(true)
           expect { instance.reset_memo_wise }.not_to raise_error
         end
+
+        it "can reset klass with nested module with initializer" do
+          instance = klass_with_nested_module_with_initializer.new(true)
+          expect { instance.reset_memo_wise }.not_to raise_error
+        end
       end
 
       context "when the class, its superclass, and its module all memoize methods" do

diff --git a/lib/memo_wise.rb b/lib/memo_wise.rb
index e793603..4a5ee2a 100644
--- a/lib/memo_wise.rb
+++ b/lib/memo_wise.rb
@@ -97,10 +97,16 @@ module MemoWise
   private_constant(:CreateMemoWiseStateOnInherited)
 
   module CreateMemoWiseStateOnIncluded
+    module CreateMemoWiseStateOnInitialize
+      class_eval(INITIALIZE_LITERAL, __FILE__, __LINE__ + 1)
+    end
+
     def included(base)
-      base.prepend(Module.new do
-        class_eval(INITIALIZE_LITERAL, __FILE__, __LINE__ + 1)
-      end)
+      if base.is_a?(Class)
+        base.prepend(CreateMemoWiseStateOnInitialize)
+      elsif !base.singleton_class?
+        base.singleton_class.prepend(CreateMemoWiseStateOnIncluded)
+      end
     end
   end
   private_constant(:CreateMemoWiseStateOnIncluded)

base.prepend(Module.new do
class_eval(INITIALIZE_LITERAL, __FILE__, __LINE__ + 1)
end)
end
end
private_constant(:CreateMemoWiseStateOnIncluded)

# @private
#
# Private setup method, called automatically by `prepend MemoWise` in a class.
Expand Down Expand Up @@ -176,6 +187,8 @@ def memo_wise(method_name_or_hash)
if klass.is_a?(Class) && !klass.singleton_class?
klass.singleton_class.prepend(CreateMemoWiseStateOnInherited)
else
klass.singleton_class.prepend(CreateMemoWiseStateOnIncluded) if klass.is_a?(Module) && !klass.singleton_class?

klass.prepend(CreateMemoWiseStateOnInherited)
end

Expand Down
47 changes: 47 additions & 0 deletions spec/memo_wise_spec.rb
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Expand Up @@ -351,11 +351,32 @@ def module2_method
end
end

let(:klass_with_initializer) do
Class.new do
include Module1
def initialize(*); end
end
end

let(:module_with_initializer) do
Module.new do
include Module1
def initialize(*); end
end
end

let(:klass_with_module_with_initializer) do
Class.new do
include Module3
end
end

let(:instance) { klass.new }

before(:each) do
stub_const("Module1", module1)
stub_const("Module2", module2)
stub_const("Module3", module_with_initializer)
end

it "memoizes inherited methods separately" do
Expand All @@ -364,6 +385,32 @@ def module2_method
expect(Array.new(4) { instance.module2_method }).to all eq("module2_method")
expect(instance.module2_method_counter).to eq(1)
end

it "can memoize klass with initializer" do
instance = klass_with_initializer.new(true)
expect { instance.module1_method }.not_to raise_error

expect(Array.new(4) { instance.module1_method }).to all eq("module1_method")
expect(instance.module1_method_counter).to eq(1)
end

it "can memoize klass with module with initializer" do
instance = klass_with_module_with_initializer.new(true)
expect { instance.module1_method }.not_to raise_error

expect(Array.new(4) { instance.module1_method }).to all eq("module1_method")
expect(instance.module1_method_counter).to eq(1)
end

it "can reset klass with initializer" do
instance = klass_with_initializer.new(true)
expect { instance.reset_memo_wise }.not_to raise_error
end

it "can reset klass with module with initializer" do
instance = klass_with_module_with_initializer.new(true)
expect { instance.reset_memo_wise }.not_to raise_error
end
end

context "when the class, its superclass, and its module all memoize methods" do
Expand Down
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