diff --git a/shadowsocks/libev/README.md b/shadowsocks/libev/README.md
index e35e757..7336509 100644
--- a/shadowsocks/libev/README.md
+++ b/shadowsocks/libev/README.md
@@ -4,3 +4,17 @@ shadowsocks-libev
 `shadowsocks-libev` is a lightweight secured socks5 proxy for embedded devices and low end boxes.
 
 It is a port of shadowsocks created by @clowwindy maintained by @madeye and @linusyang.
+
+Compared to `vimagick/shadowsocks`, `vimagick/shadowsocks-libev` uses less memory.
+
+```
+$ docker stats shadowsocks_shadowsocks_1
+
+# vimagick/shadowsocks
+CONTAINER                   CPU %               MEM USAGE/LIMIT     MEM %               NET I/O
+shadowsocks_shadowsocks_1   0.05%               16.56 MiB/741 MiB   2.23%               117.9 KiB/648 B
+
+# vimagick/shadowsocks-libev
+CONTAINER                   CPU %               MEM USAGE/LIMIT     MEM %               NET I/O
+shadowsocks_shadowsocks_1   0.00%               2.406 MiB/741 MiB   0.32%               6.475 MiB/6.425 MiB
+```