diff --git a/src/fast_cal/fast_cal.cc b/src/fast_cal/fast_cal.cc
index 5842549..71d7cbb 100644
--- a/src/fast_cal/fast_cal.cc
+++ b/src/fast_cal/fast_cal.cc
@@ -6,13 +6,25 @@
 
 #include <iostream>
 
-void FastCal::fast_cal(uint64_t code) {
+void FastCal::new_case(uint64_t code, uint64_t mask) { // callback function for new case
+    auto current = cases.find(code);
+    if (current != cases.end()) { // find existed case
+        current->second.mask |= mask; // update mask info
+        return;
+    }
+    cases[code] = fast_cal_t { // insert into cases map
+        .code = code,
+        .mask = mask,
+        .last = cache.front(), // parent case
+    };
+    cache.emplace(&cases[code]); // add in working queue
+}
 
-//    std::cout << RawCode(code).dump_case() << std::endl;
+void FastCal::fast_cal(uint64_t code) {
 
     auto core = Core(
         [this](auto &&code, auto &&mask) { // lambda as function pointer
-            add_new_case(std::forward<decltype(code)>(code), std::forward<decltype(mask)>(mask));
+            new_case(std::forward<decltype(code)>(code), std::forward<decltype(mask)>(mask));
         }
     );
 
@@ -47,22 +59,3 @@ void FastCal::fast_cal(uint64_t code) {
     }
 
 }
-
-void FastCal::add_new_case(uint64_t code, uint64_t mask) {
-
-    auto exist_case = cases.find(code);
-    if (exist_case != cases.end()) { // find existed case
-
-        exist_case->second.mask |= mask; // mask update
-        return;
-
-    }
-
-    cases[code] = fast_cal_t {
-        .code = code,
-        .mask = mask,
-        .last = cache.front(),
-    };
-    cache.emplace(&cases[code]);
-
-}
diff --git a/src/fast_cal/fast_cal.h b/src/fast_cal/fast_cal.h
index f8dbc68..5d8108f 100644
--- a/src/fast_cal/fast_cal.h
+++ b/src/fast_cal/fast_cal.h
@@ -17,6 +17,6 @@ public:
 
     void fast_cal(uint64_t code);
 
-    void add_new_case(uint64_t code, uint64_t mask);
+    void new_case(uint64_t code, uint64_t mask);
 
 };
diff --git a/src/main.cc b/src/main.cc
index 5154e46..f077aec 100644
--- a/src/main.cc
+++ b/src/main.cc
@@ -211,24 +211,9 @@ int main() {
 
 //    }
 
-//    BasicRanges::build();
-//    for (auto const &range : *BasicRanges::fetch()) {
-//        printf("%08X\n", range);
-//    }
-
-//    AllCases::build();
-//    for (uint32_t head = 0; head < 16; ++head) {
-//        uint64_t prefix = (uint64_t)head << 32;
-//        for (auto const &range : (*AllCases::fetch())[head]) {
-//            printf("%09lX\n", prefix | range);
-//        }
-//    }
-
 //    std::cout << (clock() - start_time) * 1000 / CLOCKS_PER_SEC << "ms" << std::endl;
     std::cout << (clock() - start_time) * 1000000 / CLOCKS_PER_SEC << "us" << std::endl;
 //    std::cout << "complete benchmark" << std::endl;
 
-//    while(1);
-
     return 0;
 }