Add benchmark for Magnus

Gemfile

@@ -10,6 +10,7 @@ gem 'helix-rails'
 gem "cash_flow_c", path: "./cash_flow_c/"
 gem 'cash_flow_rust_helix', path: 'crates/cash_flow_rust_helix'
 gem 'cash_flow_rust_rutie', path: 'crates/cash_flow_rust_rutie'
+gem 'cash_flow_rust_magnus', path: 'crates/cash_flow_rust_magnus'
 
 gem 'ffi' # for cash_flow_rust_ffi
 gem 'fiddle' # for cash_flow_rust_ruru

Gemfile.lock

@@ -9,6 +9,12 @@ PATH
     cash_flow_rust_helix (1.0.0)
       helix_runtime (~> 0.7.5)
 
+PATH
+  remote: crates/cash_flow_rust_magnus
+  specs:
+    cash_flow_rust_magnus (0.1.0)
+      rake (> 1)
+
 PATH
   remote: crates/cash_flow_rust_rutie
   specs:
@@ -149,6 +155,7 @@ DEPENDENCIES
   benchmark-ips
   cash_flow_c!
   cash_flow_rust_helix!
+  cash_flow_rust_magnus!
   cash_flow_rust_rutie!
   ffi
   fiddle

benchmark.rb

@@ -61,6 +61,13 @@ def cash_flow(cash_in, cash_out, reinvest_rate, term, year)
 
   x.report("rust rutie class") { RustRutie.cash_flow(10000.0, 800.0, 50.0, 30, 5) }
 
+  # ========================================
+  # Rust using magnus class method
+  # ========================================
+  require 'cash_flow_rust_magnus'
+  raise 'rust magnus class method fail' unless cash_flow(10000, 800, 50, 30, 5) == RustMagnus.cash_flow(10000, 800, 50, 30, 5)
+
+  x.report("rust magnus class") { RustMagnus.cash_flow(10000, 800, 50, 30, 5) }
 
   # ====================================
   # C using standard Ruby extension

build-libs.sh

@@ -22,3 +22,7 @@ bundle install --quiet
 cd $base_dir
 cd crates/cash_flow_rust_rutie
 bin/setup
+
+cd $base_dir
+cd crates/cash_flow_rust_magnus
+rake install

crates/cash_flow_rust_magnus/Rakefile

@@ -0,0 +1,11 @@
+# frozen_string_literal: true
+
+require "rake/testtask"
+load File.expand_path("./ext/cash_flow_rust_magnus/Rakefile", __dir__)
+
+task default: :test
+
+Rake::TestTask.new do |t|
+  t.deps << :dev << :install
+  t.test_files = FileList[File.expand_path("test/*_test.rb", __dir__)]
+end

crates/cash_flow_rust_magnus/cash_flow_rust_magnus.gemspec

@@ -0,0 +1,15 @@
+# frozen_string_literal: true
+
+Gem::Specification.new do |spec|
+  spec.name = "cash_flow_rust_magnus"
+  spec.version = "0.1.0"
+  spec.summary = "-"
+  spec.files = Dir["lib/**/*.rb"].concat(Dir["ext/cash_flow_rust_magnus/src/**/*.rs"]) << "ext/cash_flow_rust_magnus/Cargo.toml" << "ext/cash_flow_rust_magnus/Cargo.lock" << "ext/cash_flow_rust_magnus/Rakefile"
+  spec.extensions = ["ext/cash_flow_rust_magnus/Rakefile"]
+  spec.authors = ["Mat Sadler"]
+  spec.license = "MIT"
+
+  spec.requirements = ["Rust >= 1.51.0"]
+
+  spec.add_runtime_dependency "rake", "> 1"
+end