diff --git a/binding/lua_c/bench_test.lua b/binding/lua_c/bench_test.lua
index 1c02d11..82b7583 100644
--- a/binding/lua_c/bench_test.lua
+++ b/binding/lua_c/bench_test.lua
@@ -5,3 +5,167 @@
 -- ---
 -- @Author Lion <chenxin619315@gmail.com>
 -- @Date   2022/06/30
+
+local xdb = require("xdb_searcher")
+
+function printHelp()
+    print("lua bench_test.lua [command options]")
+    print("options: ")
+    print(" --db string             ip2region binary xdb file path")
+    print(" --src string            source ip text file path")
+    print(" --cache-policy string   cache policy: file/vectorIndex/content")
+end
+
+if #arg < 2 then
+    printHelp(arg)
+    return
+end
+
+-- parser the command line args
+local dbFile, srcFile = "", ""
+local cachePolicy = "vectorIndex"
+for _, r in ipairs(arg) do
+    if string.len(r) < 5 then
+        goto continue
+    end
+
+    if string.sub(r, 1, 2) ~= "--" then
+        goto continue
+    end
+
+    for k, v in string.gmatch(string.sub(r, 3), "([^=]+)=([^%s]+)") do
+        if k == "db" then
+            dbFile = v
+        elseif k == "src" then
+            srcFile = v
+        elseif k == "cache-policy" then
+            cachePolicy = v
+        end
+
+        -- break the match iterate
+        break
+    end
+
+    -- continue this loop
+    ::continue::
+end
+
+-- print(string.format("dbFile=%s, srcFile=%s, cachePolicy=%s", dbFile, srcFile, cachePolicy))
+if string.len(dbFile) < 2 or string.len(srcFile) < 2 then
+    printHelp()
+    return
+end
+
+-- create the searcher based on the cache-policy
+local searcher, v_index, content
+if cachePolicy == "file" then
+    searcher = xdb.new_with_file_only(dbFile)
+elseif cachePolicy == "vectorIndex" then
+    v_index = xdb.load_vector_index(dbFile)
+    if v_index == nil then
+        print(string.format("failed to load vector index from '%s'", dbFile))
+        return
+    end
+
+    searcher, err = xdb.new_with_vector_index(dbFile, v_index)
+    if err ~= nil then
+        print(string.format("failed to create vector index searcher: %s", err))
+        return
+    end
+elseif cachePolicy == "content" then
+    content = xdb.load_content(dbFile)
+    if content == nil then
+        print(string.format("failed to load xdb content from '%s'", dbFile))
+        return
+    end
+
+    searcher, err = xdb.new_with_buffer(content)
+    if err ~= nil then
+        print(string.format("failed to create content buffer searcher: %s", err))
+        return
+    end
+else
+    print(string.format("undefined cache-policy `%s`", cachePolicy))
+    return
+end
+
+-- do the bench test
+local handle = io.open(srcFile, "r")
+if handle == nil then
+    print(string.format("failed to open src text file `%s`", handle))
+    return
+end
+
+local lines = handle:lines()
+local sip_str, eip_str, s_region, region = "", "", "", ""
+local sip, mip, eip, err = 0, 0, 0, 0
+local count, t_time, c_time = 0, 0, 0
+local s_time = xdb.now()
+for l in lines do
+    if string.len(l) < 1 then
+        goto continue
+    end
+
+    for v1, v2, v3 in string.gmatch(l, "([%d%.]+)|([%d%.]+)|([^\n]+)") do
+        -- print(sip_str, eip_str, region)
+        sip_str = v1
+        eip_str = v2
+        s_region = v3
+        break
+    end
+
+    sip, err = xdb.check_ip(sip_str)
+    if err ~= nil then
+        print(string.format("invalid start ip `%s`", sip_str))
+        return
+    end
+
+    eip, err = xdb.check_ip(eip_str)
+    if err ~= nil then
+        print(string.format("invalid end ip `%s`", sip_str))
+        return
+    end
+
+    if sip > eip then
+        print(string.format("start ip(%s) should not be greater than end ip(%s)\n", sip_str, eip_str))
+        return
+    end
+
+    mip = (sip + eip) >> 1
+    for _, ip in ipairs({sip, (sip + mip) >> 1, mip, (mip + eip) >> 1, eip}) do
+        t_time = xdb.now()
+        region, err = searcher:search(ip)
+        c_time = c_time + xdb.now() - t_time
+        if err ~= nil then
+            print(string.format("failed to search ip `%s`", xdb.long2ip(ip)))
+            return
+        end
+
+        -- check the region
+        if region ~= s_region then
+            printf(string.format("failed search(%s) with (%s != %s)\n", xdb.long2ip(ip), region, s_region))
+            return
+        end
+
+        count = count + 1
+    end
+
+    ::continue::
+end
+
+-- resource cleanup
+searcher:close()
+if v_index ~= nil then
+    v_index:close()
+end
+if content ~= nil then
+    content:close()
+end
+
+-- print the stats
+local avg_costs = 0
+if count > 0 then
+    avg_costs = c_time / count
+end
+print(string.format("Bench finished, {cachePolicy: %s, total: %d, took: %.3f s, cost: %.3f μs/op}",
+         cachePolicy, count, (xdb.now() - s_time)/1e6, c_time / count))
diff --git a/binding/lua_c/search_test.lua b/binding/lua_c/search_test.lua
index 7f6d2d9..21627c4 100644
--- a/binding/lua_c/search_test.lua
+++ b/binding/lua_c/search_test.lua
@@ -125,11 +125,9 @@ end
 
 -- resource cleanup
 searcher:close()
-
 if v_index ~= nil then
     v_index:close()
 end
-
 if content ~= nil then
     content:close()
 end
\ No newline at end of file