diff --git a/benchmarks/mock_error/benchmark.rb b/benchmarks/mock_error/benchmark.rb
new file mode 100644
index 00000000..00d530bb
--- /dev/null
+++ b/benchmarks/mock_error/benchmark.rb
@@ -0,0 +1,8 @@
+# frozen_string_literal: true
+
+require_relative '../../harness/loader'
+
+s = "string"
+run_benchmark(1) do
+  s.some_hopefully_unknown_method
+end
diff --git a/benchmarks/mock_segv/Gemfile b/benchmarks/mock_segv/Gemfile
new file mode 100644
index 00000000..2fb0a3d1
--- /dev/null
+++ b/benchmarks/mock_segv/Gemfile
@@ -0,0 +1,3 @@
+source 'https://rubygems.org'
+
+gem 'ffi'
diff --git a/benchmarks/mock_segv/Gemfile.lock b/benchmarks/mock_segv/Gemfile.lock
new file mode 100644
index 00000000..b0a16796
--- /dev/null
+++ b/benchmarks/mock_segv/Gemfile.lock
@@ -0,0 +1,13 @@
+GEM
+  remote: https://rubygems.org/
+  specs:
+    ffi (1.16.3)
+
+PLATFORMS
+  arm64-darwin-23
+
+DEPENDENCIES
+  ffi
+
+BUNDLED WITH
+   2.4.13
diff --git a/benchmarks/mock_segv/benchmark.rb b/benchmarks/mock_segv/benchmark.rb
new file mode 100644
index 00000000..c62b7aa2
--- /dev/null
+++ b/benchmarks/mock_segv/benchmark.rb
@@ -0,0 +1,12 @@
+# frozen_string_literal: true
+
+require_relative '../../harness/loader'
+
+Dir.chdir(__dir__)
+use_gemfile
+
+require 'ffi'
+
+run_benchmark(1) do
+  FFI::Pointer.new(42).read_int
+end
diff --git a/benchmarks/mock_success/benchmark.rb b/benchmarks/mock_success/benchmark.rb
new file mode 100644
index 00000000..81267171
--- /dev/null
+++ b/benchmarks/mock_success/benchmark.rb
@@ -0,0 +1,11 @@
+# frozen_string_literal: true
+
+require_relative '../../harness/loader'
+
+i = 0
+run_benchmark(10) do
+  i = i + 1
+  handle = (i % 2 == 0 ? :STDOUT : :STDERR)
+  Object.const_get(handle).puts sprintf("using %s", handle.to_s)
+  sleep 0.25
+end