diff --git a/src/common/analyzer/rag_analyzer.cpp b/src/common/analyzer/rag_analyzer.cpp
index 2fbcce4c10..c058c72b53 100644
--- a/src/common/analyzer/rag_analyzer.cpp
+++ b/src/common/analyzer/rag_analyzer.cpp
@@ -23,6 +23,8 @@ module;
 #include <pcre2.h>
 #include <re2/re2.h>
 #include <sstream>
+#include <iostream>
+#include <chrono>
 
 #include "string_utils.h"
 
@@ -957,6 +959,62 @@ void RAGAnalyzer::EnglishNormalize(const Vector<String> &tokens, Vector<String>
     }
 }
 
+// TODO: for test
+// #ifndef INFINITY_DEBUG
+// #define INFINITY_DEBUG 1
+// #endif
+
+#ifdef INFINITY_DEBUG
+template <typename T>
+String TestPrintTokens(const Vector<T> &tokens) {
+    std::ostringstream oss;
+    for (std::size_t i = 0; i < tokens.size(); ++i) {
+        oss << (i ? " #" : "#");
+        oss << tokens[i];
+        oss << "#";
+    }
+    return std::move(oss).str();
+}
+
+inline void CheckDP(const RAGAnalyzer *this_ptr,
+                    const std::string_view input_str,
+                    const Vector<String> &dfs_tokens,
+                    const double dfs_score,
+                    const auto t0,
+                    const auto t1) {
+    const auto [dp_vec, dp_score] = this_ptr->GetBestTokens(input_str);
+    const auto t2 = std::chrono::high_resolution_clock::now();
+    const auto dfs_duration = std::chrono::duration_cast<std::chrono::duration<float, std::milli>>(t1 - t0);
+    const auto dp_duration = std::chrono::duration_cast<std::chrono::duration<float, std::milli>>(t2 - t1);
+    auto print_1 = [](const bool b) {
+        return b ? "✅✅✅" : "❌❌❌";
+    };
+    auto print_2 = [](const bool b) {
+        return b ? "" : " not";
+    };
+    const auto dp_faster = dp_duration < dfs_duration;
+    std::cerr << "\n!!! " << print_1(dp_faster) << "\nDFS duration: " << dfs_duration << " \nDP  duration: " << dp_duration;
+    const auto b_score_eq = dp_score == dfs_score;
+    std::cerr << std::format("\n{} DFS and DP score{} equal:\nDFS: {}\nDP : {}\n", print_1(b_score_eq), print_2(b_score_eq), dfs_score, dp_score);
+    bool vec_equal = true;
+    if (dp_vec.size() != dfs_tokens.size()) {
+        vec_equal = false;
+    } else {
+        for (std::size_t k = 0; k < dp_vec.size(); ++k) {
+            if (dp_vec[k] != dfs_tokens[k]) {
+                vec_equal = false;
+                break;
+            }
+        }
+    }
+    std::cerr << std::format("{} DFS and DP result{} equal:\nDFS: {}\nDP : {}\n",
+                             print_1(vec_equal),
+                             print_2(vec_equal),
+                             TestPrintTokens(dfs_tokens),
+                             TestPrintTokens(dp_vec));
+}
+#endif
+
 void RAGAnalyzer::TokenizeInner(Vector<String> &res, const String &L) const {
     auto [tks, s] = MaxForward(L);
     auto [tks1, s1] = MaxBackward(L);
@@ -992,7 +1050,15 @@ void RAGAnalyzer::TokenizeInner(Vector<String> &res, const String &L) const {
         Vector<Vector<Pair<String, int>>> token_list;
         Vector<String> best_tokens;
         double max_score = -100.0F;
-        DFS(Join(tks, _j, j, ""), 0, pre_tokens, token_list, best_tokens, max_score, false);
+        const auto str_for_dfs = Join(tks, _j, j, "");
+#ifdef INFINITY_DEBUG
+        const auto t0 = std::chrono::high_resolution_clock::now();
+#endif
+        DFS(str_for_dfs, 0, pre_tokens, token_list, best_tokens, max_score, false);
+#ifdef INFINITY_DEBUG
+        const auto t1 = std::chrono::high_resolution_clock::now();
+        CheckDP(this, str_for_dfs, best_tokens, max_score, t0, t1);
+#endif
         res.push_back(Join(best_tokens, 0));
 
         same = 1;
@@ -1009,7 +1075,15 @@ void RAGAnalyzer::TokenizeInner(Vector<String> &res, const String &L) const {
         Vector<Vector<Pair<String, int>>> token_list;
         Vector<String> best_tokens;
         double max_score = -100.0F;
-        DFS(Join(tks, _j, tks.size(), ""), 0, pre_tokens, token_list, best_tokens, max_score, false);
+        const auto str_for_dfs = Join(tks, _j, tks.size(), "");
+#ifdef INFINITY_DEBUG
+        const auto t0 = std::chrono::high_resolution_clock::now();
+#endif
+        DFS(str_for_dfs, 0, pre_tokens, token_list, best_tokens, max_score, false);
+#ifdef INFINITY_DEBUG
+        const auto t1 = std::chrono::high_resolution_clock::now();
+        CheckDP(this, str_for_dfs, best_tokens, max_score, t0, t1);
+#endif
         res.push_back(Join(best_tokens, 0));
     }
 
@@ -1048,7 +1122,15 @@ void RAGAnalyzer::TokenizeInner(Vector<String> &res, const String &L) const {
         Vector<Vector<Pair<String, int>>> token_list;
         Vector<String> best_tokens;
         double max_score = -100.0F;
-        DFS(Join(tks, s, e < tks.size() ? e + 1 : e, ""), 0, pre_tokens, token_list, best_tokens, max_score, false);
+        const auto str_for_dfs = Join(tks, s, e < tks.size() ? e + 1 : e, "");
+#ifdef INFINITY_DEBUG
+        const auto t0 = std::chrono::high_resolution_clock::now();
+#endif
+        DFS(str_for_dfs, 0, pre_tokens, token_list, best_tokens, max_score, false);
+#ifdef INFINITY_DEBUG
+        const auto t1 = std::chrono::high_resolution_clock::now();
+        CheckDP(this, str_for_dfs, best_tokens, max_score, t0, t1);
+#endif
         // Vector<Pair<Vector<String>, double>> sorted_tokens;
         // SortTokens(token_list, sorted_tokens);
         // res.push_back(Join(sorted_tokens[0].first, 0));
@@ -1146,7 +1228,7 @@ String RAGAnalyzer::Tokenize(const String &line) {
             res.push_back(L);
             continue;
         }
-
+#if 1
         if (length > MAX_SENTENCE_LEN) {
             Vector<String> sublines;
             SplitLongText(L, length, sublines);
@@ -1154,7 +1236,7 @@ String RAGAnalyzer::Tokenize(const String &line) {
                 TokenizeInner(res, l);
             }
         } else
-
+#endif
             TokenizeInner(res, L);
     }
     Vector<String> normalize_res;