Add benchmarks for Sequel with common plugins

benchmarks.yml

@@ -26,6 +26,9 @@ railsbench:
 ruby-lsp:
   desc: Run several operations with the Ruby language server used by VSCode
   category: headline
+sequel:
+  desc: sequel repeatedly queries entries in a SQLite table with highly-random names.
+  category: headline
 
 #
 # Other Benchmarks

benchmarks/sequel/Gemfile

@@ -0,0 +1,3 @@
+source "https://rubygems.org"
+gem "sequel", "~> 5.63"
+gem "sqlite3", "~> 1.4", platform: :ruby

benchmarks/sequel/Gemfile.lock

@@ -0,0 +1,17 @@
+GEM
+  remote: https://rubygems.org/
+  specs:
+    mini_portile2 (2.8.1)
+    sequel (5.64.0)
+    sqlite3 (1.5.4)
+      mini_portile2 (~> 2.8.0)
+
+PLATFORMS
+  x86_64-darwin-20
+
+DEPENDENCIES
+  sequel (~> 5.63)
+  sqlite3 (~> 1.4)
+
+BUNDLED WITH
+   2.4.1

benchmarks/sequel/benchmark.rb

@@ -0,0 +1,66 @@
+require "harness"
+require 'random/formatter'
+
+Dir.chdir __dir__
+use_gemfile
+
+require "sequel"
+
+# Sequel with common plugins & extensions
+%i[
+  escaped_like
+  migration
+  sql_log_normalizer 
+  sqlite_json_ops
+].each { |name| Sequel.extension name }
+
+DB = Sequel.sqlite
+
+DB.create_table :posts do
+  primary_key :id
+  String :title, null: false
+  String :body
+  String :type_name, null: false
+  String :key, null: false
+  Integer :upvotes, null: false
+  Integer :author_id, null: false
+  DateTime :created_at, default: Sequel::CURRENT_TIMESTAMP
+  DateTime :updated_at, default: Sequel::CURRENT_TIMESTAMP
+end
+
+%i[
+  association_dependencies
+  auto_validations
+  json_serializer
+  nested_attributes
+  prepared_statements
+  require_valid_schema
+  subclasses
+  validation_helpers
+].each { |name| Sequel::Model.plugin name }
+
+Sequel::Model.plugin :serialization, :json, :data
+Sequel::Model.plugin :timestamps, update_on_create: true 
+
+class Post < Sequel::Model 
+end
+
+10000.times {
+  Post.create(title: Random.alphanumeric(30),
+              type_name: Random.alphanumeric(10),
+              key: Random.alphanumeric(10),
+              body: Random.alphanumeric(100),
+              upvotes: rand(30),
+              author_id: rand(30))
+}
+
+# heat any caches
+Post.where(id: 1).first.title
+
+run_benchmark(10) do
+  1.upto(1000) do |i|
+    post = Post.where(id: i).first
+    "#{post.title}\n#{post.body}"
+    "type: #{post.type_name}, votes: #{post.upvotes}, updated on: #{post.updated_at}"
+  end
+end