Bizur team member here. For etcd benchmarking we used the 'benchmark' tool from etcd's source (commit d62ce55, ~3.1.0-rc1). AFAIK that tool does use the v3 api

Bizur team member here. For etcd benchmarking we used the 'benchmark' tool from etcd's source (commit d62ce55, ~3.1.0-rc1). AFAIK that tool does use the v3 api. The paper was completed before etcd 3.1 was released. etcd's docs stated (at that time) that the client is not linearizable. We only tested writes. As for performance, it's hard to say if our results pair up with the official etcd results (we were not aware of them - were they published at the time?). The hardware & software setup used for benchmarking is different.