diff --git a/modules/graph/grin/src/index/order.cc b/modules/graph/grin/src/index/order.cc
index bc87bbfa..ea8a9bc5 100644
--- a/modules/graph/grin/src/index/order.cc
+++ b/modules/graph/grin/src/index/order.cc
@@ -26,7 +26,8 @@ bool grin_smaller_vertex(GRIN_GRAPH g, GRIN_VERTEX v1, GRIN_VERTEX v2) {
 size_t grin_get_position_of_vertex_from_sorted_list(GRIN_GRAPH g, GRIN_VERTEX_LIST vl, GRIN_VERTEX v) {
     auto _g = static_cast<GRIN_GRAPH_T*>(g)->g;
     auto _vl = static_cast<GRIN_VERTEX_LIST_T*>(vl);
-    auto vtype = (unsigned)_g->vertex_label(_GRIN_VERTEX_T(v)); // TODO: optimize after rebase
+    auto bg = static_cast<GRIN_GRAPH_T*>(g);
+    auto vtype = bg->cache->id_parser.GetLabelId(v);
     if (vtype < _vl->type_begin || vtype >= _vl->type_end) return GRIN_NULL_SIZE;
     auto offset = v - _vl->vrs[vtype - _vl->type_begin].begin_value();
     if (offset < _vl->vrs[vtype - _vl->type_begin].size()) {
diff --git a/modules/graph/grin/src/partition/partition.cc b/modules/graph/grin/src/partition/partition.cc
index 9cca7633..d291f05d 100644
--- a/modules/graph/grin/src/partition/partition.cc
+++ b/modules/graph/grin/src/partition/partition.cc
@@ -105,6 +105,7 @@ GRIN_GRAPH grin_get_local_graph_by_partition(GRIN_PARTITIONED_GRAPH pg, GRIN_PAR
     g->client.Connect(_pg->socket);
     g->_g = std::dynamic_pointer_cast<_GRIN_GRAPH_T>(g->client.GetObject(_pg->lgs[p]));
     g->g = g->_g.get();
+    _prepare_cache(g);
     return g;
 }
 #endif
diff --git a/modules/graph/grin/src/partition/reference.cc b/modules/graph/grin/src/partition/reference.cc
index dcf30791..97d2f7d9 100644
--- a/modules/graph/grin/src/partition/reference.cc
+++ b/modules/graph/grin/src/partition/reference.cc
@@ -37,9 +37,8 @@ GRIN_VERTEX grin_get_vertex_from_vertex_ref(GRIN_GRAPH g, GRIN_VERTEX_REF vr) {
 
 GRIN_PARTITION grin_get_master_partition_from_vertex_ref(GRIN_GRAPH g, GRIN_VERTEX_REF vr) {
     auto _g = static_cast<GRIN_GRAPH_T*>(g)->g;
-    auto id_parser = vineyard::IdParser<GRIN_VERTEX_REF_T>(); //TODO optimize after rebase
-    id_parser.Init(_g->fnum(), _g->vertex_label_num());
-    return id_parser.GetFid(vr);
+    auto bg = static_cast<GRIN_GRAPH_T*>(g);
+    return bg->cache->id_parser.GetFid(vr);
 }
 
 const char* grin_serialize_vertex_ref(GRIN_GRAPH g, GRIN_VERTEX_REF vr) {
@@ -74,12 +73,12 @@ GRIN_VERTEX_REF grin_deserialize_to_vertex_ref(GRIN_GRAPH g, const char* msg) {
 
 bool grin_is_master_vertex(GRIN_GRAPH g, GRIN_VERTEX v) {
     auto _g = static_cast<GRIN_GRAPH_T*>(g)->g;
-    return _g->IsInnerVertex(_GRIN_VERTEX_T(v)); // TODO
+    return _g->IsInnerVertex(_GRIN_VERTEX_T(v));
 }
 
 bool grin_is_mirror_vertex(GRIN_GRAPH g, GRIN_VERTEX v) {
     auto _g = static_cast<GRIN_GRAPH_T*>(g)->g;
-    return _g->IsOuterVertex(_GRIN_VERTEX_T(v)); // TODO
+    return _g->IsOuterVertex(_GRIN_VERTEX_T(v));
 }
 #endif
 
diff --git a/modules/graph/grin/src/predefine.cc b/modules/graph/grin/src/predefine.cc
index bb60a706..d1fc2fce 100644
--- a/modules/graph/grin/src/predefine.cc
+++ b/modules/graph/grin/src/predefine.cc
@@ -72,11 +72,11 @@ const void* _get_value_from_vertex_property_table(GRIN_GRAPH g, GRIN_VERTEX_PROP
     grin_error_code = GRIN_ERROR_CODE::NO_ERROR;
     auto _g = static_cast<GRIN_GRAPH_T*>(g)->g;
     auto _vpt = static_cast<GRIN_VERTEX_PROPERTY_TABLE_T*>(vpt);
-    if (v < _vpt->vbegin || v >= _vpt->vend) {
+    unsigned vtype = _grin_get_type_from_property(vp);
+    if (v < _vpt->vbegin || v >= _vpt->vend || vtype != _vpt->vtype) {
         grin_error_code = GRIN_ERROR_CODE::INVALID_VALUE;
         return NULL;
-    }
-    unsigned vtype = _grin_get_type_from_property(vp);
+    }    
     unsigned vprop = _grin_get_prop_from_property(vp);
     auto offset = v - _vpt->vbegin;
     auto array = _g->vertex_data_table(vtype)->column(vprop)->chunk(0);
@@ -153,3 +153,25 @@ unsigned _grin_get_type_from_property(unsigned long long int prop) {
 unsigned _grin_get_prop_from_property(unsigned long long int prop) {
     return (unsigned)(prop & 0xffffffff);
 }
+
+void _prepare_cache(GRIN_GRAPH_T* g) {
+    g->cache = new _GRAPH_CACHE();
+    g->cache->id_parser = vineyard::IdParser<_GRIN_GRAPH_T::vid_t>();
+    g->cache->id_parser.Init(g->g->fnum(), g->g->vertex_label_num());
+
+    for (int i = 0; i < g->g->vertex_label_num(); ++i) {
+        g->cache->vtype_names.push_back(g->g->schema().GetVertexLabelName(i));
+        g->cache->vprop_names.push_back(std::vector<std::string>());
+        for (int j = 0; j < g->g->vertex_property_num(i); ++j) {
+            g->cache->vprop_names[i].push_back(g->g->schema().GetVertexPropertyName(i, j));
+        } 
+    }
+
+    for (int i = 0; i < g->g->edge_label_num(); ++i) {
+        g->cache->etype_names.push_back(g->g->schema().GetEdgeLabelName(i));
+        g->cache->eprop_names.push_back(std::vector<std::string>());
+        for (int j = 0; j < g->g->edge_property_num(i); ++j) {
+            g->cache->eprop_names[i].push_back(g->g->schema().GetEdgePropertyName(i, j));
+        } 
+    }
+}
diff --git a/modules/graph/grin/src/predefine.h b/modules/graph/grin/src/predefine.h
index 01fc6671..d446c3d1 100644
--- a/modules/graph/grin/src/predefine.h
+++ b/modules/graph/grin/src/predefine.h
@@ -96,13 +96,26 @@ unsigned _grin_get_prop_from_property(unsigned long long int);
 #define GRIN_VID_T uint64_t
 
 /* The following data types shall be defined through typedef. */
-typedef vineyard::ArrowFragment<GRIN_OID_T, GRIN_VID_T> _GRIN_GRAPH_T;                 
+typedef vineyard::ArrowFragment<GRIN_OID_T, GRIN_VID_T> _GRIN_GRAPH_T;   
+struct _GRAPH_CACHE {
+    vineyard::IdParser<_GRIN_GRAPH_T::vid_t> id_parser;
+    std::vector<std::string> vtype_names;
+    std::vector<std::string> etype_names;
+    std::vector<std::vector<std::string>> vprop_names;
+    std::vector<std::vector<std::string>> eprop_names;
+};
+
 struct GRIN_GRAPH_T {
     vineyard::Client client;
     std::shared_ptr<_GRIN_GRAPH_T> _g;
     _GRIN_GRAPH_T* g;
+    _GRAPH_CACHE* cache;
 };
-typedef _GRIN_GRAPH_T::vertex_t _GRIN_VERTEX_T;     
+
+void _prepare_cache(GRIN_GRAPH_T* g);
+
+typedef _GRIN_GRAPH_T::vertex_t _GRIN_VERTEX_T;    
+
 struct GRIN_EDGE_T {
     _GRIN_GRAPH_T::vid_t src;
     _GRIN_GRAPH_T::vid_t dst;
diff --git a/modules/graph/grin/src/property/property.cc b/modules/graph/grin/src/property/property.cc
index da060a55..896245c0 100644
--- a/modules/graph/grin/src/property/property.cc
+++ b/modules/graph/grin/src/property/property.cc
@@ -17,12 +17,8 @@ extern "C" {
 
 #ifdef GRIN_WITH_VERTEX_PROPERTY_NAME
 const char* grin_get_vertex_property_name(GRIN_GRAPH g, GRIN_VERTEX_TYPE vtype, GRIN_VERTEX_PROPERTY vp) {
-    auto _g = static_cast<GRIN_GRAPH_T*>(g)->g;
-    auto s = _g->schema().GetVertexPropertyName(_grin_get_type_from_property(vp), _grin_get_prop_from_property(vp));
-    int len = s.length() + 1;
-    char* out = new char[len];
-    snprintf(out, len, "%s", s.c_str());
-    return out; // TODO: optimize after rebase, put strings in g.
+    auto bg = static_cast<GRIN_GRAPH_T*>(g);
+    return bg->cache->vprop_names[_grin_get_type_from_property(vp)][_grin_get_prop_from_property(vp)].c_str();
 }
 
 GRIN_VERTEX_PROPERTY grin_get_vertex_property_by_name(GRIN_GRAPH g, GRIN_VERTEX_TYPE vtype,
@@ -54,12 +50,8 @@ GRIN_VERTEX_PROPERTY_LIST grin_get_vertex_properties_by_name(GRIN_GRAPH g, const
 
 #ifdef GRIN_WITH_EDGE_PROPERTY_NAME
 const char* grin_get_edge_property_name(GRIN_GRAPH g, GRIN_EDGE_TYPE etype, GRIN_EDGE_PROPERTY ep) {
-    auto _g = static_cast<GRIN_GRAPH_T*>(g)->g;
-    auto s = _g->schema().GetEdgePropertyName(_grin_get_type_from_property(ep), _grin_get_prop_from_property(ep));
-    int len = s.length() + 1;
-    char* out = new char[len];
-    snprintf(out, len, "%s", s.c_str());
-    return out; // TODO
+    auto bg = static_cast<GRIN_GRAPH_T*>(g);
+    return bg->cache->eprop_names[_grin_get_type_from_property(ep)][_grin_get_prop_from_property(ep)].c_str();
 }
 
 GRIN_EDGE_PROPERTY grin_get_edge_property_by_name(GRIN_GRAPH g, GRIN_EDGE_TYPE etype,
diff --git a/modules/graph/grin/src/property/type.cc b/modules/graph/grin/src/property/type.cc
index bb0de2c9..1a678cce 100644
--- a/modules/graph/grin/src/property/type.cc
+++ b/modules/graph/grin/src/property/type.cc
@@ -22,7 +22,8 @@ bool grin_equal_vertex_type(GRIN_GRAPH g, GRIN_VERTEX_TYPE vt1, GRIN_VERTEX_TYPE
 
 GRIN_VERTEX_TYPE grin_get_vertex_type(GRIN_GRAPH g, GRIN_VERTEX v) {
     auto _g = static_cast<GRIN_GRAPH_T*>(g)->g;
-    return _g->vertex_label(_GRIN_VERTEX_T(v));  // TODO
+    auto bg = static_cast<GRIN_GRAPH_T*>(g);
+    return bg->cache->id_parser.GetLabelId(v);
 }
 
 void grin_destroy_vertex_type(GRIN_GRAPH g, GRIN_VERTEX_TYPE vt) {}
@@ -66,11 +67,8 @@ GRIN_VERTEX_TYPE grin_get_vertex_type_from_list(GRIN_GRAPH g, GRIN_VERTEX_TYPE_L
 #ifdef GRIN_WITH_VERTEX_TYPE_NAME
 const char* grin_get_vertex_type_name(GRIN_GRAPH g, GRIN_VERTEX_TYPE vtype) {
     auto _g = static_cast<GRIN_GRAPH_T*>(g)->g;
-    auto s = _g->schema().GetVertexLabelName(vtype);
-    int len = s.length() + 1;
-    char* out = new char[len];
-    snprintf(out, len, "%s", s.c_str());
-    return out; // TODO
+    auto bg = static_cast<GRIN_GRAPH_T*>(g);
+    return bg->cache->vtype_names[vtype].c_str();
 }
 
 GRIN_VERTEX_TYPE grin_get_vertex_type_by_name(GRIN_GRAPH g, const char* name) {
@@ -144,11 +142,8 @@ GRIN_EDGE_TYPE grin_get_edge_type_from_list(GRIN_GRAPH g, GRIN_EDGE_TYPE_LIST et
 #ifdef GRIN_WITH_EDGE_TYPE_NAME
 const char* grin_get_edge_type_name(GRIN_GRAPH g, GRIN_EDGE_TYPE etype) {
     auto _g = static_cast<GRIN_GRAPH_T*>(g)->g;
-    auto s = _g->schema().GetEdgeLabelName(etype);
-    int len = s.length() + 1;
-    char* out = new char[len];
-    snprintf(out, len, "%s", s.c_str());
-    return out;    // TODO
+    auto bg = static_cast<GRIN_GRAPH_T*>(g);
+    return bg->cache->etype_names[etype].c_str();
 }
 
 GRIN_EDGE_TYPE grin_get_edge_type_by_name(GRIN_GRAPH g, const char* name) {
diff --git a/modules/graph/grin/src/topology/structure.cc b/modules/graph/grin/src/topology/structure.cc
index 8f8503bb..c29e433a 100644
--- a/modules/graph/grin/src/topology/structure.cc
+++ b/modules/graph/grin/src/topology/structure.cc
@@ -33,11 +33,13 @@ GRIN_GRAPH grin_get_graph_from_storage(int argc, char** argv) {
  
     g->_g = std::dynamic_pointer_cast<_GRIN_GRAPH_T>(g->client.GetObject(obj_id));
     g->g = g->_g.get();
+    _prepare_cache(g);
     return g;
 }
 
 void grin_destroy_graph(GRIN_GRAPH g) {
     auto _g = static_cast<GRIN_GRAPH_T*>(g);
+    delete _g->cache;
     delete _g;
 }