Fix minor performance issues with variable copy (#394)

Signed-off-by: Neil R. Spruit <neil.r.spruit@intel.com>

Author: nrspruit

source/layers/validation/checkers/basic_leak/zel_basic_leak_checker.cpp

@@ -309,7 +309,7 @@ namespace validation_layer
             std::cerr << " \\--->";
 
             for (size_t i = 0; i < dtors.size(); i++) {
-                auto name = dtors[i];
+                const auto& name = dtors[i];
                 auto zeCount = counts[name].load();
                 diff -= zeCount;
 

source/loader/ze_loader.cpp

@@ -235,7 +235,7 @@ namespace loader
         }
 
         // Replace the original driver vector with the ordered one
-        *drivers = orderedDrivers;
+        *drivers = std::move(orderedDrivers);
 
         if (debugTraceEnabled) {
             std::string message = "driverOrdering: Drivers after ZEL_DRIVERS_ORDER:";
@@ -676,7 +676,7 @@ namespace loader
             }
         }
 
-        for( auto driverInfo : discoveredDrivers )
+        for( const auto& driverInfo : discoveredDrivers )
         {
             if (discoveredDrivers.size() == 1) {
                 auto handle = LOAD_DRIVER_LIBRARY( driverInfo.path.c_str() );