[Minor] Speedup TPC-H benchmark run with memtable option (apache#16159)

* Speedup tpch run with memtable

* Clippy

* Clippy

Author: Dandandan

benchmarks/src/tpch/run.rs

@@ -109,29 +109,32 @@ impl RunOpt {
         };
 
         let mut benchmark_run = BenchmarkRun::new();
-        for query_id in query_range {
-            benchmark_run.start_new_case(&format!("Query {query_id}"));
-            let query_run = self.benchmark_query(query_id).await?;
-            for iter in query_run {
-                benchmark_run.write_iter(iter.elapsed, iter.row_count);
-            }
-        }
-        benchmark_run.maybe_write_json(self.output_path.as_ref())?;
-        Ok(())
-    }
-
-    async fn benchmark_query(&self, query_id: usize) -> Result<Vec<QueryResult>> {
         let mut config = self
             .common
             .config()?
             .with_collect_statistics(!self.disable_statistics);
         config.options_mut().optimizer.prefer_hash_join = self.prefer_hash_join;
         let rt_builder = self.common.runtime_env_builder()?;
         let ctx = SessionContext::new_with_config_rt(config, rt_builder.build_arc()?);
-
         // register tables
         self.register_tables(&ctx).await?;
 
+        for query_id in query_range {
+            benchmark_run.start_new_case(&format!("Query {query_id}"));
+            let query_run = self.benchmark_query(query_id, &ctx).await?;
+            for iter in query_run {
+                benchmark_run.write_iter(iter.elapsed, iter.row_count);
+            }
+        }
+        benchmark_run.maybe_write_json(self.output_path.as_ref())?;
+        Ok(())
+    }
+
+    async fn benchmark_query(
+        &self,
+        query_id: usize,
+        ctx: &SessionContext,
+    ) -> Result<Vec<QueryResult>> {
         let mut millis = vec![];
         // run benchmark
         let mut query_results = vec![];
@@ -146,14 +149,14 @@ impl RunOpt {
             if query_id == 15 {
                 for (n, query) in sql.iter().enumerate() {
                     if n == 1 {
-                        result = self.execute_query(&ctx, query).await?;
+                        result = self.execute_query(ctx, query).await?;
                     } else {
-                        self.execute_query(&ctx, query).await?;
+                        self.execute_query(ctx, query).await?;
                     }
                 }
             } else {
                 for query in sql {
-                    result = self.execute_query(&ctx, query).await?;
+                    result = self.execute_query(ctx, query).await?;
                 }
             }