After switching to ci-hbase, our pre commit job runs much slower than before.
This is because the new hbase jenkins node has less cpu cores than the hadoop jenkins node, so we have less concurrency when executing UTs as the default forkCount is 0.25C, which is related to the number of cores of the build node. In HBASE-26828, I've increased the concurrency to 0.5C, so we can almost get the speed back, but it is also easier to hit failing flaky tests. I've already opened several issues to address some of them, while other committers are also doing the same thing. Please stay tuned. Thanks.
