diff --git a/port/linux/ci_benchmark.sh b/port/linux/ci_benchmark.sh
index 74ef97b63..6271b1cd1 100644
--- a/port/linux/ci_benchmark.sh
+++ b/port/linux/ci_benchmark.sh
@@ -1,4 +1,7 @@
-cd Release && make -j
-cd ..
-bash ci_benchmark_run.sh
-python3 ci_benchmark_calibration.py
+sh ci_benchmark_times.sh 2
+python3 ci_benchmark_select.py
+
+#clear
+rm benchmark_result_*.json
+rm performance_data.json
+echo 
diff --git a/port/linux/ci_benchmark_calibration.py b/port/linux/ci_benchmark_calibration.py
index 972ffb2b9..06cb29d3b 100644
--- a/port/linux/ci_benchmark_calibration.py
+++ b/port/linux/ci_benchmark_calibration.py
@@ -1,6 +1,12 @@
 #!/usr/bin/python3
 import json
-with open('benchmark_result.json', 'r', encoding='utf8') as json_in:
+import sys
+import os
+import fcntl
+
+benchmark_result_file_path = sys.argv[1]
+
+with open(benchmark_result_file_path, 'r', encoding='utf8') as json_in:
     json_data = dict(json.load(json_in))
     benchmarks_data = list(json_data['benchmarks'])
 
@@ -31,11 +37,22 @@ benchmarks_data[0]['cpu_time'] = performance_point_res
 benchmarks_data[0]['time_unit'] = 'Point'
 
 print('---------------------------------------------')
-print('Perfomance point:', int(performance_point_res))
+print('Perfomance point:', int(performance_point_res), '\n')
 
 # update json_data
 json_data['benchmarks'] = benchmarks_data
 
 # save json
-with open('benchmark_result.json', 'w') as json_out:
-    json.dump(json_data, json_out)
+with open(benchmark_result_file_path, 'w') as benchmark_reqult_file:
+    json.dump(json_data, benchmark_reqult_file)
+
+lock_file_path = 'performance_data.lock'
+
+# save performance_data
+with open('performance_data.json', 'r') as perf_json_file:
+    # lock
+    fcntl.flock(perf_json_file.fileno(), fcntl.LOCK_EX)
+    perf_json_data: list = json.load(perf_json_file)
+    with open('performance_data.json', 'w') as perf_json_file:
+        perf_json_data.append(performance_point_res)
+        json.dump(perf_json_data, perf_json_file)
diff --git a/port/linux/ci_benchmark_run.sh b/port/linux/ci_benchmark_run.sh
index df48e9b16..9732d6952 100644
--- a/port/linux/ci_benchmark_run.sh
+++ b/port/linux/ci_benchmark_run.sh
@@ -1 +1,2 @@
-Release/benchmark/pikascript_benchmark --benchmark_format=json | tee benchmark_result.json 
+echo write benchmark result to $1
+Release/benchmark/pikascript_benchmark --benchmark_format=json | tee $1 
diff --git a/port/linux/ci_benchmark_select.py b/port/linux/ci_benchmark_select.py
new file mode 100644
index 000000000..09f05fdbd
--- /dev/null
+++ b/port/linux/ci_benchmark_select.py
@@ -0,0 +1,22 @@
+#!/usr/bin/python3
+import json
+from select import select
+import sys
+import os
+import shutil
+
+with open('performance_data.json', 'r') as perf_json_file:
+    perf_json_data: list = json.load(perf_json_file)
+    perf_data_with_index = []
+    for i in range(perf_json_data.__len__()):
+        perf_data_with_index.append({'index': i+1, 'value': perf_json_data[i]})
+
+    perf_data_with_index_sorted = sorted(
+        perf_data_with_index, key=lambda e: e['value'])
+
+    selected = perf_data_with_index_sorted[int(perf_json_data.__len__()/2)]
+    print('=============================================')
+    print('selected: ', selected)
+
+    shutil.copy('benchmark_result_' +
+                str(selected['index']) + '.json', 'benchmark_result.json')
diff --git a/port/linux/ci_benchmark_times.sh b/port/linux/ci_benchmark_times.sh
new file mode 100644
index 000000000..209245a8b
--- /dev/null
+++ b/port/linux/ci_benchmark_times.sh
@@ -0,0 +1,17 @@
+cd Release && make -j
+cd ..
+
+RUN_TIMES=$1
+# init
+rm performance_data*
+rm benchmark*.json
+touch performance_data.json
+echo [] > performance_data.json
+
+for ((i=1; i<=RUN_TIMES;i++))
+do
+    OUT_FILE=benchmark_result_$i.json
+    # main
+    bash ci_benchmark_run.sh $OUT_FILE > /dev/null && \
+    python3 ci_benchmark_calibration.py $OUT_FILE
+done