Blockchain speed

One ongoing concern for blockchain systems is performance. Public blockchains are global systems, with their system resources shared by all the users in the world simultaneously. With such a large user base, resource constraints are a real concern and have already caused real problems. For instance, a popular game called CryptoKitties was launched on Ethereum and caused the network to become congested. Other applications became nearly unusable, as the load from CryptoKitties overwhelmed the network.