Add dynamic worker pool with bounded queue and concurrency tests

pool_bench_test.go

@@ -0,0 +1,19 @@
+package worker
+
+import "testing"
+
+func BenchmarkQueueRingSteady(b *testing.B) {
+	p, err := New(0, 6)
+	if err != nil {
+		b.Fatal(err)
+	}
+	task := func() {}
+	b.ReportAllocs()
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		p.mu.Lock()
+		p.enqueueLocked(task)
+		p.dequeueLocked()
+		p.mu.Unlock()
+	}
+}