little statement_cache test changes

test/orm/sql/StatementCacheTest.cpp

@@ -38,20 +38,33 @@ public:
 
   }
 
-  double get_average_lock_wait_time() const {
+  std::chrono::milliseconds get_average_lock_wait_time() const {
     std::lock_guard lock(mutex_);
     if (lock_failure_count_ == 0) {
-      return 0.0;
+      return std::chrono::milliseconds{0};
     }
-    return std::chrono::duration<double>(total_lock_wait_time_).count() / lock_failure_count_;
+    const auto millis = std::chrono::duration_cast<std::chrono::milliseconds>(total_lock_wait_time_);
+    return std::chrono::milliseconds(millis.count() / lock_failure_count_);
   }
 
-  double get_average_execution_time() const {
+  std::chrono::milliseconds get_average_execution_time() const {
     std::lock_guard lock(mutex_);
     if (execution_count_ == 0) {
-      return 0.0;
+      return std::chrono::milliseconds{0};
     }
-    return std::chrono::duration<double>(total_execution_time_).count() / execution_count_;
+
+    const auto millis = std::chrono::duration_cast<std::chrono::milliseconds>(total_execution_time_);
+    return std::chrono::milliseconds(millis.count() / execution_count_);
+  }
+
+  std::chrono::milliseconds get_total_lock_wait_time() const {
+      std::lock_guard lock(mutex_);
+      return std::chrono::duration_cast<std::chrono::milliseconds>(total_lock_wait_time_);
+  }
+
+  std::chrono::milliseconds get_total_execution_time() const {
+      std::lock_guard lock(mutex_);
+      return std::chrono::duration_cast<std::chrono::milliseconds>(total_execution_time_);
   }
 
   size_t get_lock_failure_count() const {
@@ -266,8 +279,10 @@ TEST_CASE("Multithreaded stress test", "[statement][cache][stress]") {
 
   std::cout << "[Performance] Executed " << (thread_count * iterations) << " statements in " << duration.count() << " ms (lock failed: " << lock_failed_count << ", execute failed: " << exec_failed_count << ")\n";
 
-  std::cout << "Average lock wait time: " << metrics.get_average_lock_wait_time() << "s\n";
-  std::cout << "Average execution time: " << metrics.get_average_execution_time() << "s\n";
+  std::cout << "Average lock wait time: " << metrics.get_average_lock_wait_time().count() << "ms\n";
+  std::cout << "Total lock wait time: " << metrics.get_total_lock_wait_time().count() << "ms\n";
+  std::cout << "Average execution time: " << metrics.get_average_execution_time().count() << "ms\n";
+  std::cout << "Total execution time: " << metrics.get_total_execution_time().count() << "ms\n";
   std::cout << "Number of lock failures: " << metrics.get_lock_failure_count() << "\n";
 
   // Some events should be generated