make running bencmarks optional

test/benchmark_test.rb

@@ -1,36 +1,38 @@
 require File.expand_path("../helper.rb", __FILE__)
 
-class BenchmarkTest < QCTest
-
-  def test_enqueue
-    n = 10_000
-    start = Time.now
-    n.times do
-      QC.enqueue("1.odd?", [])
-    end
-    assert_equal(n, QC.count)
-
-    elapsed = Time.now - start
-    assert_in_delta(4, elapsed, 1)
-  end
-
-  def test_dequeue
-    worker = QC::Worker.new
-    worker.running = true
-    n = 10_000
-    n.times do
-      QC.enqueue("1.odd?", [])
+if ENV["QC_BENCHMARK"]
+  class BenchmarkTest < QCTest
+
+    def test_enqueue
+      n = 10_000
+      start = Time.now
+      n.times do
+        QC.enqueue("1.odd?", [])
+      end
+      assert_equal(n, QC.count)
+
+      elapsed = Time.now - start
+      assert_in_delta(4, elapsed, 1)
     end
-    assert_equal(n, QC.count)
-
-    start = Time.now
-    n.times do
-      worker.work
+
+    def test_dequeue
+      worker = QC::Worker.new
+      worker.running = true
+      n = 10_000
+      n.times do
+        QC.enqueue("1.odd?", [])
+      end
+      assert_equal(n, QC.count)
+
+      start = Time.now
+      n.times do
+        worker.work
+      end
+      elapsed = Time.now - start
+
+      assert_equal(0, QC.count)
+      assert_in_delta(10, elapsed, 3)
     end
-    elapsed = Time.now - start
-
-    assert_equal(0, QC.count)
-    assert_in_delta(10, elapsed, 3)
+
   end
-
 end