diff --git a/sha1-checked/README.md b/sha1-checked/README.md
index 32c4bc91..f66e34cf 100644
--- a/sha1-checked/README.md
+++ b/sha1-checked/README.md
@@ -18,7 +18,8 @@ unsuitable for further use in any security critical capacity, as it is
 But, this crate provides the detection [algorithm] pioneered by git, to detect hash collisions when they
 occur and prevent them. The [paper] has more details on how this works.
 
-This implementation will be slower to use than the pure SHA-1 implementation, as more work as to be done.
+This implementation will be slower to use than the pure SHA-1 implementation, as it has to do more computations and
+it can not rely on hardware acceleration available on some CPUs.
 
 ## Examples