message: Update benchmark info in README.
diff: @@ -38,7 +38,7 @@ Refer to our [Data Import](https://duckdb.org/docs/data/overview) section for mo
  The [website](https://duckdb.org/docs/sql/introduction) contains a reference of functions and SQL constructs available in DuckDB.
  ## Development
  -For development, DuckDB requires [CMake](https://cmake.org), Python3 and a `C++11` compliant compiler. Run `make` in the root directory to compile the sources. For development, use `make debug` to build a non-optimized debug version. You should run `make unit` and `make allunit` to verify that your version works properly after making changes. To test performance, you can run several standard benchmarks from the root directory by executing `./build/release/benchmark/benchmark_runner`.
  +For development, DuckDB requires [CMake](https://cmake.org), Python3 and a `C++11` compliant compiler. Run `make` in the root directory to compile the sources. For development, use `make debug` to build a non-optimized debug version. You should run `make unit` and `make allunit` to verify that your version works properly after making changes. To test performance, you can run `BUILD_BENCHMARK=1 BUILD_TPCH=1 make` and then perform several standard benchmarks from the root directory by executing `./build/release/benchmark/benchmark_runner`. The detail of benchmarks is in our [Benchmark Guide](benchmark/README.md)
  Please also refer to our [Contribution Guide](CONTRIBUTING.md).
  