If there are difficulties with the choice of a CPU, you will solve them by looking at full benchmark Intel Core i7-8557U Cinebench r23 score multi and single core and decide is it a good processor or a bad one to buy, how powerful is this CPU. Here you can find useful information from Cinebench r23 benchmark. A careful review of all the technical characteristics, to make it easier to understand, is summarized in the table. After reading the results of joint test and video, you can already make an informed decision about do you need to buy Intel Core i7-8557U or not.
All the figures in the text above do not mean that taking them into account you should fully trust a simple comparison of these numbers. Better to watch the testing video and read the opinion of real owners of Intel Core i7-8557U before making a choice buy this CPU or not.