diff --git a/README.md b/README.md
index 0c409cb..f4dfb9c 100644
--- a/README.md
+++ b/README.md
@@ -89,8 +89,14 @@ cat gencode.v35.annotation.gff3 \
 
 ![count](https://user-images.githubusercontent.com/5798442/101999832-30b1ae80-3d24-11eb-96fe-e5000bed1f5c.png)
 
-Note: `count` is slower than other Unix commands because it runs in a Ruby script.
+Note: `count` command is not very fast because it runs in a Ruby script.
+This is fine if the data is small, that is, in most cases. However, if you want to visualize huge data, it is faster to use a combination of common Unix commands as shown below.
 
+```sh
+cat gencode.v35.annotation.gff3 | grep -v '#' | grep 'gene' | cut -f1 \
+|sort | uniq -c | sort -nrk2 | awk '{print $2,$1}' \
+| uplot bar -d ' ' -t "The number of human gene annotations per chromosome"  -c blue
+```
 
 ## Usage