1 files changed, 24 insertions, 0 deletions
diff --git a/benchmark/io_select3.yml b/benchmark/io_select3.yml
new file mode 100644
index 0000000000..c97d0e0cd1
--- /dev/null
+++ b/benchmark/io_select3.yml
@@ -0,0 +1,24 @@
+prelude: |
+  # IO.select performance. a lot of fd
+benchmark:
+  io_select3: |
+
+    ios = []
+    nr = 100
+    if defined?(Process::RLIMIT_NOFILE)
+      max = Process.getrlimit(Process::RLIMIT_NOFILE)[0]
+    else
+      max = 64
+    end
+    puts "max fd: #{max} (results not apparent with <= 1024 max fd)"
+
+    (max - 10).times do
+      r, w = IO.pipe
+      r.close
+      ios.push w
+    end
+
+    nr.times do
+      IO.select nil, ios
+    end
+loop_count: 1