diff --git a/faster_tokenizer/run_build_cpp_lib.sh b/faster_tokenizer/run_build_cpp_lib.sh
index 0d8e9b8bf67d..27ed230f095f 100644
--- a/faster_tokenizer/run_build_cpp_lib.sh
+++ b/faster_tokenizer/run_build_cpp_lib.sh
@@ -16,6 +16,14 @@
 mkdir -p build_cpp
 cd build_cpp
 rm -rf *
-cmake .. -DWITH_PYTHON=ON -DWITH_TESTING=OFF -DCMAKE_BUILD_TYPE=Release
-make -j48
-cd ..
\ No newline at end of file
+platform="$(uname -s)"
+if [[ $platform == Linux* ]];
+then
+  core_num=`nproc`
+else
+  core_num=`sysctl -n hw.logicalcpu`
+fi
+echo "Compile with $core_num cores"
+cmake .. -DWITH_PYTHON=OFF -DWITH_TESTING=OFF -DCMAKE_BUILD_TYPE=Release
+make -j${core_num}
+cd ..
diff --git a/faster_tokenizer/run_build_py_lib.sh b/faster_tokenizer/run_build_py_lib.sh
index c6d61e6257b1..7dd028a5623b 100644
--- a/faster_tokenizer/run_build_py_lib.sh
+++ b/faster_tokenizer/run_build_py_lib.sh
@@ -24,12 +24,15 @@ do
    then
       export LD_LIBRARY_PATH=/opt/_internal/cpython-3.${py_version}.0/lib/:${LD_LIBRARY_PATH}
       export PATH=/opt/_internal/cpython-3.${py_version}.0/bin/:${PATH}
+      core_num=${nproc}
    else
       export LD_LIBRARY_PATH=/Users/paddle/miniconda2/envs/py3${py_version}/lib/:${LD_LIBRARY_PATH}
       export PATH=/Users/paddle/miniconda2/envs/py3${py_version}/bin/:${PATH}
+      core_num=${sysctl -n hw.logicalcpu}
    fi
+   echo "Compile with $core_num cores"
    cmake .. -DWITH_PYTHON=ON -DWITH_TESTING=OFF -DCMAKE_BUILD_TYPE=Release
-   make -j24
+   make -j${core_num}
    cd ..
 done