Default compiler threads based on available RAM, but no more or less than available cores

easyinstall.sh

@@ -49,7 +49,13 @@ echo -e $logo
 CONNECT_TYPE="FULLSPEC"
 # clang v11 is the latest distributed by Buster
 COMPILER="clang++-11"
-CORES=1
+MEM=$(grep MemTotal /proc/meminfo | awk '{print $2}')
+CORES=`expr $MEM / 450000`
+if [ $CORES -gt $(nproc) ]; then
+       	CORES=$(nproc)
+elif [ $CORES -lt 1 ]; then
+       	CORES=1
+fi
 USER=$(whoami)
 BASE=$(dirname "$(readlink -f "${0}")")
 CPP_PATH="$BASE/cpp"