sundy-li commented on PR #4144:
URL: https://github.com/apache/arrow-rs/pull/4144#issuecomment-1524592016
I profiled the test case `test_select_1` and found that prepare cause much
more latency in TcpClient.
```
cargo test --release --package arrow-flight --example flight_sql_server
--all-features --features flight-sql-experimental --features tls --
tests::test_select_1 --exact --nocapture
running 1 test
testing uds client
prepare cost: 761.35µs
execute cost: 671.36µs
do get cost: 716.169µs
Client finished!
=======
testing tcp client
prepare cost: 41.503622ms
execute cost: 1.55827ms
do get cost: 1.58378ms
Client finished!
=======
testing https client
prepare cost: 1.39358ms
execute cost: 1.31692ms
do get cost: 1.354041ms
Client finished!
=======
test tests::test_select_1 ... ok
```
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