This test compares performance of following operations.
To check the complexity of the querySelectorAll(), this test shows how the performance changes as the tree size changes. Tree will grow from to (including the tree root) in increment of . For each step of tree grow, the operations will be called times to get average performance of each operation. To remove outliers, the average calculation will be repeated times and . So each operation will be called times per each step of tree growth. Due to this iteration, this test will take some time.