Performance metrics for cloud.google.com/go/bigtable v1.1.0 vs v1.3.0 which show a stall at 2k ops/sec. tested from n1-highcpu-8 against a 6 node bigtable cluster.
$ for VERSION in v1.1.0 v1.3.0; do git reset --hard; go get cloud.google.com/go/bigtable@${VERSION}; go get cloud.google.com/go@v0.57.0; go build; go list -m all | egrep 'cloud.google.com/go|google.golang.org'; for C in 10 25 50 75 100 125; do ./run_bt_load.sh --concurrency=$C --duration=30s 2>&1 | grep -- '- finished'; done; done
HEAD is now at 4299de614e bigtable v1.1.0 - reproduce breaking performance
go: downloading google.golang.org/genproto v0.0.0-20200603110839-e855014d5736
go: downloading github.com/golang/protobuf v1.4.1
go: downloading google.golang.org/api v0.26.0
go: downloading google.golang.org/protobuf v1.24.0
go: downloading google.golang.org/appengine v1.6.6