diff --git a/CMakeLists.txt b/CMakeLists.txt
index e99c306..6663ca3 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,5 +1,5 @@
 cmake_minimum_required(VERSION 3.31)
-project(yggminer)
+project(yggm)
 file(GLOB ${PROJECT_NAME}SOURCES *.cpp)
 file(GLOB ${PROJECT_NAME}HEADERS *.h)
 add_executable(${PROJECT_NAME} sources/main.cpp)
diff --git a/README.md b/README.md
index 6e8d6c2..15d84de 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,8 @@
-# yggminer
-
+# yggm
+### Yggdrasil address miner
+# How to build
+```sh
+git clone https://rcxpony.name/rcxpony/yggm.git && cd yggm
+cmake -B build && cmake --build build -j$(nproc)
+build/yggm
+```
diff --git a/sources/main.cpp b/sources/main.cpp
index d0569e4..8725a13 100644
--- a/sources/main.cpp
+++ b/sources/main.cpp
@@ -9,6 +9,7 @@
 #include <memory.h>
 #include <thread>
 #include <regex>
+#include <atomic>
 #include <arpa/inet.h>
 #include <immintrin.h>
 using Key = std::array<unsigned char, 32>;
@@ -20,13 +21,13 @@ struct KeysBox {
 struct option {
     unsigned int proc = 0;
     bool log = true;
-    int high = 20;
+    std::atomic<int> high{ 20 };
     std::string outputfile;
 };
 static option conf;
 int parameters(option& conf, std::string arg) {
     if (arg.find(" ") != std::string::npos) {
-        const size_t npos = -1;
+        const unsigned long npos = std::string::npos;
         int position = arg.find(" ");
         std::istringstream ss(arg.substr(position + 1));
         if (arg.find("--threads") != npos || arg.find("-t") != npos) {
@@ -35,8 +36,10 @@ int parameters(option& conf, std::string arg) {
             return 0;
         }
         if (arg.find("--altitude") != npos || arg.find("-a") != npos) {
-            ss >> std::hex >> conf.high;
+            int tmp_high;
+            ss >> std::hex >> tmp_high;
             if (ss.fail()) return 1;
+            conf.high = tmp_high;
             return 0;
         }
     }
@@ -44,6 +47,7 @@ int parameters(option& conf, std::string arg) {
     else if (arg == "--altitude" || arg == "-a") return 777;
     return 0;
 }
+
 void displayConfig() {
     unsigned short processor_count = std::thread::hardware_concurrency();
     if (conf.proc == 0 || conf.proc > static_cast<unsigned int>(processor_count)) {
@@ -63,23 +67,25 @@ std::string getAddress(const Address& rawAddr) {
 }
 inline std::string keyToString(const Key& key) {
     std::string result;
-    result.reserve(64);
+    result.resize(64);
+    const char* hexDigits = "0123456789abcdef";
     for (int i = 0; i < 32; ++i) {
-        result.push_back("0123456789abcdef"[key.data()[i] >> 4]);
-        result.push_back("0123456789abcdef"[key.data()[i] & 0x0F]);
+        result[2 * i] = hexDigits[key[i] >> 4];
+        result[2 * i + 1] = hexDigits[key[i] & 0x0F];
     }
     return result;
 }
+
 inline Key bitwiseInverse(const Key& key) noexcept {
     Key inverted;
-    std::transform(key.begin(), key.end(), inverted.begin(), [](unsigned char byte) {
-        return static_cast<unsigned char>(~byte);
-    });
+    for (unsigned long i = 0; i < 32; i++) {
+        inverted[i] = ~key[i];
+    }
     return inverted;
 }
 int getOnes(const Key&& value) noexcept {
     int leadOnes = 0;
-    for (int i = 0; i < 17; ++i) {
+    for (unsigned char i = 0; i < 17; ++i) {
         if (value[i] == 0xFF) {
             leadOnes += 8;
         } else {
@@ -95,13 +101,17 @@ int getOnes(const Key&& value) noexcept {
     return leadOnes;
 }
 void miner_thread() {
-    KeysBox keys;
-    int ones;
-    while (1) {
-        keys = getKeyPair();
-        if ((ones = getOnes(bitwiseInverse(keys.PublicKey))) > conf.high) {
-            conf.high = ones;
-            printf("\nAddr:\t2%x\nPK:\t%s\nSK:\t%s\n", ones, keyToString(keys.PublicKey).c_str(), keyToString(keys.PrivateKey).c_str());
+    while (true) {
+        KeysBox keys = getKeyPair();
+        int ones = getOnes(bitwiseInverse(keys.PublicKey));
+        int current = conf.high.load(std::memory_order_relaxed);
+        if (ones > current) {
+            while (!conf.high.compare_exchange_weak(current, ones, std::memory_order_relaxed)) {
+                if (ones <= current) break;
+            }
+            if (ones > current) {
+                printf("\nAddr:\t2%x\nPK:\t%s\nSK:\t%s\n", ones, keyToString(keys.PublicKey).c_str(), keyToString(keys.PrivateKey).c_str());
+            }
         }
     }
 }
@@ -137,6 +147,7 @@ int main(int argc, char* argv[]) {
     displayConfig();
     startThreads();
 }
+/*
 void getRawAddress(int lErase, Key& InvertedPublicKey, Address& rawAddr) {
     lErase++;
     const int bitsToShift = lErase % 8;
@@ -155,7 +166,6 @@ void getRawAddress(int lErase, Key& InvertedPublicKey, Address& rawAddr) {
     rawAddr[1] = static_cast<unsigned char>(lErase - 1);
     memcpy(&rawAddr[2], &InvertedPublicKey[start], 14);
 }
-/*
 void logKeys(const Address& raw, const KeysBox& keys) {
     std::cout << std::endl;
     std::cout << " Address:    " << getAddress(raw) << std::endl;