diff --git a/src/fast_cal/cal_core.cc b/src/fast_cal/cal_core.cc
index 039c10c..2388c4d 100644
--- a/src/fast_cal/cal_core.cc
+++ b/src/fast_cal/cal_core.cc
@@ -2,13 +2,11 @@
 #include "fast_cal.h"
 
 Core FastCal::init(uint64_t code) { // initialize process
-    /// clear working data
+    /// reset working data
     cases.clear();
+    cases.reserve(FC_MAP_RESERVE); // hashmap pre-reserve
     std::queue<fast_cal_t*>{}.swap(cache);
 
-    // TODO: test the speed without hashmap reserve
-    cases.reserve(65536);
-
     /// insert root node
     cache.emplace(&cases.emplace(code, fast_cal_t {
         .code = code,
@@ -39,7 +37,7 @@ void FastCal::new_case(uint64_t code, uint64_t mask) {
 }
 
 /// found first matched target
-RawCode FastCal::target(RawCode code, const check_t &match) {
+RawCode FastCal::target(RawCode code, const match_t &match) {
     auto core = init((uint64_t)code);
     /// start bfs search
     while (!cache.empty()) {
@@ -53,7 +51,7 @@ RawCode FastCal::target(RawCode code, const check_t &match) {
 }
 
 /// found multi-targets matched in first same layer
-std::vector<RawCode> FastCal::target_multi(RawCode code, const check_t &match) {
+std::vector<RawCode> FastCal::target_multi(RawCode code, const match_t &match) {
     auto core = init((uint64_t)code);
     auto layer_end = cache.back();
     std::vector<RawCode> matched; // matched list
diff --git a/src/fast_cal/fast_cal.h b/src/fast_cal/fast_cal.h
index 46b3f2f..50e72e7 100644
--- a/src/fast_cal/fast_cal.h
+++ b/src/fast_cal/fast_cal.h
@@ -6,27 +6,25 @@
 #include <unordered_map>
 #include "raw_code.h"
 
+const uint32_t FC_MAP_RESERVE = 65536;
+
 /// FastCal not found -> return invalid raw code
 const RawCode FC_NOT_FOUND = RawCode::unsafe_create(0);
 
 class FastCal {
 public:
-    const static auto NOT_FOUND = (uint64_t)0;
-    typedef std::function<bool(uint64_t)> check_t;
-
-//    const static RawCode *test = (RawCode*)nullptr;
+    typedef std::function<bool(uint64_t)> match_t;
 
     /// xxx_multi only search until same layer
 
-    // TODO: shall we use RawCode instead of uint64_t?
-
+    /// BFS search functions
     RawCode solve(RawCode code);
-    RawCode target(RawCode code, const check_t &match);
-
     std::vector<RawCode> furthest(RawCode code);
-
     std::vector<RawCode> solve_multi(RawCode code);
-    std::vector<RawCode> target_multi(RawCode code, const check_t &match);
+    RawCode target(RawCode code, const match_t &match);
+    std::vector<RawCode> target_multi(RawCode code, const match_t &match);
+
+
 
     // TODO: search / search_multi / resolve / resolve_multi
     // TODO: static furthest function
diff --git a/src/main.cc b/src/main.cc
index 2759ee3..0b1dad2 100644
--- a/src/main.cc
+++ b/src/main.cc
@@ -15,20 +15,20 @@
 
 int main() {
 
-//    BasicRanges::build();
+    BasicRanges::build();
 
 //    std::cout << "wait 3s" << std::endl;
 //    sleep(3);
 
-//    std::cout << "start benchmark" << std::endl;
+    std::cout << "start benchmark" << std::endl;
     auto start_time = clock();
 
 //    AllCases::build();
 
     auto f = FastCal();
 //    auto ret = f.solve((uint64_t)RawCode::from_common_code("1a9bf0c"));
-//    auto ret = f.solve(RawCode::from_common_code("1a9bf0c"));
-    auto ret = f.solve(RawCode::from_common_code("1aaef0c"));
+    auto ret = f.solve(RawCode::from_common_code("1a9bf0c"));
+//    auto ret = f.solve(RawCode::from_common_code("1aaef0c"));
 
     if (ret == FC_NOT_FOUND) {
         std::cout << "not found" << std::endl;