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-rw-r--r--benchmark/bm_vm_thread_pass_flood.rb2
1 files changed, 2 insertions, 0 deletions
diff --git a/benchmark/bm_vm_thread_pass_flood.rb b/benchmark/bm_vm_thread_pass_flood.rb
index 27157d1a6f..a660aafc18 100644
--- a/benchmark/bm_vm_thread_pass_flood.rb
+++ b/benchmark/bm_vm_thread_pass_flood.rb
@@ -1,3 +1,5 @@
+# n.b. this is a good test for GVL when pinned to a single CPU
+
1000.times{
Thread.new{loop{Thread.pass}}
}