import ska flat_hash_map (#34464)

* import ska flat_hash_map

* add define NOMINMAX macro to fix windows build failed bug

* add brackets to std::max in flat_hash_map

* move flat_hash_map directions

* modify namespace to paddle

* modify namespace to paddle

* modify namespace to paddle

* modify namespace to paddle

* rm not used map.h and replace with op_info

paddle/fluid/framework/op_info.h

@@ -24,6 +24,7 @@ limitations under the License. */
 #include "paddle/fluid/framework/type_defs.h"
 #include "paddle/fluid/platform/enforce.h"
 #include "paddle/fluid/platform/macros.h"
+#include "paddle/utils/flat_hash_map.h"
 
 namespace paddle {
 namespace framework {
@@ -160,15 +161,15 @@ class OpInfoMap {
     }
   }
 
-  const std::unordered_map<std::string, OpInfo>& map() const { return map_; }
+  const paddle::flat_hash_map<std::string, OpInfo>& map() const { return map_; }
 
-  std::unordered_map<std::string, OpInfo>* mutable_map() { return &map_; }
+  paddle::flat_hash_map<std::string, OpInfo>* mutable_map() { return &map_; }
 
   std::vector<std::string> GetUseDefaultGradOpDescMakerOps() const;
 
  private:
   OpInfoMap() = default;
-  std::unordered_map<std::string, OpInfo> map_;
+  paddle::flat_hash_map<std::string, OpInfo> map_;
 
   DISABLE_COPY_AND_ASSIGN(OpInfoMap);
 };

paddle/fluid/framework/operator.h

@@ -37,6 +37,7 @@ limitations under the License. */
 #include "paddle/fluid/memory/malloc.h"
 #include "paddle/fluid/platform/device_context.h"
 #include "paddle/fluid/platform/variant.h"
+#include "paddle/utils/flat_hash_map.h"
 
 namespace paddle {
 namespace framework {
@@ -473,9 +474,9 @@ class OperatorWithKernel : public OperatorBase {
                      const VariableNameMap& outputs, const AttributeMap& attrs)
       : OperatorBase(type, inputs, outputs, attrs) {}
 
-  static std::unordered_map<std::string /* op_type */, OpKernelMap>&
+  static paddle::flat_hash_map<std::string /* op_type */, OpKernelMap>&
   AllOpKernels() {
-    static std::unordered_map<std::string, OpKernelMap> g_all_op_kernels;
+    static paddle::flat_hash_map<std::string, OpKernelMap> g_all_op_kernels;
     return g_all_op_kernels;
   }