Perhaps you are thinking about choosing a CPU, you will be able to make a choice after reading the full benchmark Intel Core i7-8557U Cinebench r15 score multi and single core and decide how powerful is this processor, is it a good CPU or a bad one to buy. Here is all information from Cinebench r15 benchmark. A thorough review of all the specifications, to make it easier to read, is summarized in the table. After reading the results of joint test and video, you can already make an briefed decision about do you need to buy Intel Core i7-8557U or not.
However, it should be understood that the summary data that you have looked at here do not mean that taking them into account you should totally trust a simple comparison of these figures. Better to watch benchmarks video and read the opinion of real owners of Intel Core i7-8557U before making a decision buy this processor or not.