There is a better response to this up in this thread (https://news.ycombinator.com/item?id=13661735 https://news.ycombinator.com/item?id=13661735). The test is

There is a better response to this up in this thread (https://news.ycombinator.com/item?id=13661735 https://news.ycombinator.com/item?id=13661735). The test is testing the worst-case scenario of everything needing locking. CockroachDB uses an optimistic "locking" approach which makes this bad. But if you're use-case is strictly linearizable high-throughput reads good luck finding anything that is not a single-machine database.