diff --git a/btc-address/src/main.rs b/btc-address/src/main.rs
index 95cdab4..7ebfed6 100644
--- a/btc-address/src/main.rs
+++ b/btc-address/src/main.rs
@@ -69,14 +69,17 @@ fn make_btc_address(public_key: &PublicKey) -> String {
     bs58::encode(&btc_addr).into_string()
 }
 
+#[inline]
 fn calc_sha256(i: &[u8]) -> Vec<u8> {
     calc_hash(Sha256::default(), i)
 }
 
+#[inline]
 fn calc_ripemd160(i: &[u8]) -> Vec<u8> {
     calc_hash(Ripemd160::default(), i)
 }
 
+#[inline]
 fn calc_hash<T>(mut hasher: T, i: &[u8]) -> Vec<u8> where T: Input + FixedOutput {
     hasher.input(&i);
     hasher.fixed_result().to_vec()