Avoid the string as the key of map to improve the jit performance (#21292)

* Avoid the string as the key of map to improve the jit performance.

test=develop

* Use map to replace unordered_map.

test=develop

paddle/fluid/operators/jit/helper.cc

@@ -22,9 +22,8 @@ namespace paddle {
 namespace operators {
 namespace jit {
 
-std::unordered_map<std::string, std::shared_ptr<void>>& GetFuncCacheMap() {
-  static thread_local std::unordered_map<std::string, std::shared_ptr<void>>
-      g_func_cache_map;
+std::map<size_t, std::shared_ptr<void>>& GetFuncCacheMap() {
+  static thread_local std::map<size_t, std::shared_ptr<void>> g_func_cache_map;
   return g_func_cache_map;
 }
 

paddle/fluid/operators/jit/helper.h

@@ -15,6 +15,7 @@
 #pragma once
 
 #include <iostream>
+#include <map>
 #include <memory>
 #include <string>
 #include <unordered_map>
@@ -176,8 +177,7 @@ typename KernelTuple::func_type GetDefaultBestFunc(
   return funcs[0];
 }
 
-extern std::unordered_map<std::string, std::shared_ptr<void>>&
-GetFuncCacheMap();
+extern std::map<size_t, std::shared_ptr<void>>& GetFuncCacheMap();
 
 template <typename KernelTuple, typename PlaceType>
 class KernelFuncs {
@@ -185,7 +185,7 @@ class KernelFuncs {
   KernelFuncs() = default;
   static KernelFuncs& Cache() {
     auto& func_cache_map = GetFuncCacheMap();
-    std::string key = typeid(KernelFuncs<KernelTuple, PlaceType>).name();
+    auto key = typeid(KernelFuncs<KernelTuple, PlaceType>).hash_code();
     auto iter = func_cache_map.find(key);
     if (iter != func_cache_map.end()) {
       return *(KernelFuncs<KernelTuple, PlaceType>*)(iter->second.get());

paddle/fluid/operators/jit/kernel_pool.cc

@@ -21,9 +21,8 @@ namespace paddle {
 namespace operators {
 namespace jit {
 
-std::unordered_map<std::string, std::shared_ptr<void>>& GetJITCodesMap() {
-  static thread_local std::unordered_map<std::string, std::shared_ptr<void>>
-      g_jit_codes_map;
+std::map<size_t, std::shared_ptr<void>>& GetJITCodesMap() {
+  static thread_local std::map<size_t, std::shared_ptr<void>> g_jit_codes_map;
   return g_jit_codes_map;
 }
 

paddle/fluid/operators/jit/kernel_pool.h

@@ -14,6 +14,7 @@
 
 #pragma once
 
+#include <map>
 #include <memory>  // for unique_ptr
 #include <string>
 #include <unordered_map>
@@ -28,7 +29,7 @@ namespace paddle {
 namespace operators {
 namespace jit {
 
-extern std::unordered_map<std::string, std::shared_ptr<void>>& GetJITCodesMap();
+extern std::map<size_t, std::shared_ptr<void>>& GetJITCodesMap();
 
 template <KernelType KT>
 class JitCodePool {
@@ -39,7 +40,7 @@ class JitCodePool {
   JitCodePool() = default;
   static JitCodePool& Instance() {
     auto& jit_codes_map = GetJITCodesMap();
-    std::string key = typeid(JitCodePool<KT>).name();
+    auto key = typeid(JitCodePool<KT>).hash_code();
     auto iter = jit_codes_map.find(key);
     if (iter != jit_codes_map.end()) {
       return *(JitCodePool<KT>*)(iter->second.get());