gem loading benchmark needs to have the in-fork require fixed also

benchmarks/benchmarks_helper.rb

@@ -1,28 +1,3 @@
-require 'benchmark/ips'
 require 'datadog'
 require 'pry'
-
-module JobReporter
-  def report(name, *args, **opts, &block)
-    caller_path = caller_locations.first.path
-    prefix = File.basename(caller_path).sub(/_.*\z/, '')
-    name = "#{prefix} - #{name}"
-    # Older Rubies (e.g. 2.5) do not permit passing *args and &block
-    # in the same invocation.
-    if args.any? && block_given?
-      raise ArgumentError, 'Unsupported usage'
-    elsif block_given?
-      if opts.any?
-        super(name, **opts, &block)
-      else
-        super(name, &block)
-      end
-    else
-      super(name, *args, **opts)
-    end
-  end
-end
-
-class Benchmark::IPS::Job
-  prepend JobReporter
-end
+require_relative 'benchmarks_ips_patch'

benchmarks/benchmarks_ips_patch.rb

@@ -0,0 +1,26 @@
+require 'benchmark/ips'
+
+module JobReporter
+  def report(name, *args, **opts, &block)
+    caller_path = caller_locations.first.path
+    prefix = File.basename(caller_path).sub(/_.*\z/, '')
+    name = "#{prefix} - #{name}"
+    # Older Rubies (e.g. 2.5) do not permit passing *args and &block
+    # in the same invocation.
+    if args.any? && block_given?
+      raise ArgumentError, 'Unsupported usage'
+    elsif block_given?
+      if opts.any?
+        super(name, **opts, &block)
+      else
+        super(name, &block)
+      end
+    else
+      super(name, *args, **opts)
+    end
+  end
+end
+
+class Benchmark::IPS::Job
+  prepend JobReporter
+end

benchmarks/library_gem_loading.rb

@@ -19,9 +19,10 @@ def benchmark_gem_loading
 
       lib = File.expand_path('../lib', '#{__dir__}')
       $LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
+      $LOAD_PATH.unshift('#{__dir__}')
 
       VALIDATE_BENCHMARK_MODE = #{VALIDATE_BENCHMARK_MODE}
-      require 'benchmark/ips'
+      require 'benchmarks_ips_patch'
 
       Benchmark.ips do |x|
         # Gem loading is quite slower than the other microbenchmarks