Cockroach Labs' 2020 Cloud Report provides an in-depth analysis of cloud performance, comparing AWS, Google Cloud Platform (GCP), and Azure through over 1,000 benchmark tests, including CPU, network throughput, storage I/O, and TPC-C, a tool simulating e-commerce workloads. The findings reveal that GCP has notably improved its performance, bringing it closer to AWS and Azure, particularly in the TPC-C benchmarks where all three clouds now exhibit similar top-end performance. The report also emphasizes the significance of efficiency, with GCP offering the best performance per dollar among tested machine types, though AWS excels purely in throughput. Additionally, the report introduces Azure to the benchmarking process and shares open-source tools like Roachprod for replicating tests, underlining the commitment to transparency and reproducibility in cloud performance evaluation.