fix: write benchmarks return type

Author: SockworkOrange

benchmark/BenchmarkRunner/Benchmarks/MysqlWriteBenchmark.cs

@@ -32,9 +32,9 @@ public void GlobalSetup()
     }
 
     [IterationSetup]
-    public async Task IterationSetup()
+    public void IterationSetup()
     {
-        await MysqlDatabaseHelper.CleanupWriteTableAsync(_connectionString);
+        MysqlDatabaseHelper.CleanupWriteTableAsync(_connectionString).GetAwaiter().GetResult();
         Helpers.InvokeGarbageCollection();
     }
 

benchmark/BenchmarkRunner/Benchmarks/PostgresqlWriteBenchmark.cs

@@ -32,9 +32,9 @@ public void GlobalSetup()
     }
 
     [IterationSetup]
-    public async Task IterationSetup()
+    public void IterationSetup()
     {
-        await PostgresqlDatabaseHelper.CleanupWriteTableAsync(_connectionString);
+        PostgresqlDatabaseHelper.CleanupWriteTableAsync(_connectionString).GetAwaiter().GetResult();
         Helpers.InvokeGarbageCollection();
     }
 

benchmark/BenchmarkRunner/Benchmarks/SqliteWriteBenchmark.cs

@@ -32,9 +32,9 @@ public void GlobalSetup()
     }
 
     [IterationSetup]
-    public async Task IterationSetup()
+    public void IterationSetup()
     {
-        await SqliteDatabaseHelper.CleanupWriteTableAsync(_connectionString);
+        SqliteDatabaseHelper.CleanupWriteTableAsync(_connectionString).GetAwaiter().GetResult();
         Helpers.InvokeGarbageCollection();
     }