1 files changed, 2 insertions, 0 deletions

diff --git a/README.md b/README.md
index 1394963..8d08e55 100644
--- a/README.md
+++ b/README.md
@@ -7,3 +7,5 @@ pi = pi + sin(pi)
 ```
 
 Usage: `./pi` - generate 100 digits of pi; `./pi n` - generate n digits of pi
+
+Takes time roughly proportional to n<sup>2</sup> to generate n digits.