diff --git a/tools/generate_emu_config/package_win.bat b/tools/generate_emu_config/package_win.bat
index 9c1d7499..4503fb40 100644
--- a/tools/generate_emu_config/package_win.bat
+++ b/tools/generate_emu_config/package_win.bat
@@ -11,9 +11,15 @@ set "out_dir=bin\package\win"
 
 set /a MEM_PERCENT=90
 set /a DICT_SIZE_MB=384
-set /a THREAD_COUNT=13
 set "packager=..\..\third-party\deps\win\7za\7za.exe"
 
+:: use 70%
+if defined NUMBER_OF_PROCESSORS (
+  set /a THREAD_COUNT=NUMBER_OF_PROCESSORS*70/100
+) else (
+  set /a THREAD_COUNT=2
+)
+
 if not exist "%packager%" (
   1>&2 echo "[X] packager app wasn't found"
   set /a last_code=1