diff --git a/services/engine-sha512/src/sha256/soft.rs b/services/engine-sha512/src/sha256/soft.rs
index 34826a7e8..0ab1f2b17 100644
--- a/services/engine-sha512/src/sha256/soft.rs
+++ b/services/engine-sha512/src/sha256/soft.rs
@@ -39,7 +39,7 @@ fn sha256load(v2: [u32; 4], v3: [u32; 4]) -> [u32; 4] {
 fn sha256swap(v0: [u32; 4]) -> [u32; 4] {
     [v0[2], v0[3], v0[0], v0[1]]
 }
-
+#[inline(never)] // bunnie: reduce binary size
 fn sha256msg1(v0: [u32; 4], v1: [u32; 4]) -> [u32; 4] {
     // sigma 0 on vectors
     #[inline]
@@ -52,7 +52,7 @@ fn sha256msg1(v0: [u32; 4], v1: [u32; 4]) -> [u32; 4] {
 
     add(v0, sigma0x4(sha256load(v0, v1)))
 }
-
+#[inline(never)] // bunnie: reduce binary size
 fn sha256msg2(v4: [u32; 4], v3: [u32; 4]) -> [u32; 4] {
     macro_rules! sigma1 {
         ($a:expr) => {
@@ -70,7 +70,7 @@ fn sha256msg2(v4: [u32; 4], v3: [u32; 4]) -> [u32; 4] {
 
     [w19, w18, w17, w16]
 }
-
+#[inline(never)] // bunnie: reduce binary size
 fn sha256_digest_round_x2(cdgh: [u32; 4], abef: [u32; 4], wk: [u32; 4]) -> [u32; 4] {
     macro_rules! big_sigma0 {
         ($a:expr) => {
@@ -162,6 +162,7 @@ macro_rules! schedule_rounds4 {
 }
 
 /// Process a block with the SHA-256 algorithm.
+#[inline(never)] // bunnie: reduce binary size
 fn sha256_digest_block_u32(state: &mut [u32; 8], block: &[u32; 16]) {
     let mut abef = [state[0], state[1], state[4], state[5]];
     let mut cdgh = [state[2], state[3], state[6], state[7]];
diff --git a/services/engine-sha512/src/sha512/soft.rs b/services/engine-sha512/src/sha512/soft.rs
index 86105e7e8..7cead514f 100644
--- a/services/engine-sha512/src/sha512/soft.rs
+++ b/services/engine-sha512/src/sha512/soft.rs
@@ -17,6 +17,7 @@ fn sha512load(v0: [u64; 2], v1: [u64; 2]) -> [u64; 2] {
 }
 
 /// Performs 2 rounds of the SHA-512 message schedule update.
+#[inline(never)] // bunnie: reduce binary size
 pub fn sha512_schedule_x2(v0: [u64; 2], v1: [u64; 2], v4to5: [u64; 2], v7: [u64; 2]) -> [u64; 2] {
     // sigma 0
     fn sigma0(x: u64) -> u64 {
@@ -46,6 +47,7 @@ pub fn sha512_schedule_x2(v0: [u64; 2], v1: [u64; 2], v4to5: [u64; 2], v7: [u64;
 }
 
 /// Performs one round of the SHA-512 message block digest.
+#[inline(never)] // bunnie: reduce binary size
 pub fn sha512_digest_round(
     ae: [u64; 2],
     bf: [u64; 2],
@@ -100,6 +102,7 @@ pub fn sha512_digest_round(
 }
 
 /// Process a block with the SHA-512 algorithm.
+#[inline(never)] // bunnie: reduce binary size
 pub fn sha512_digest_block_u64(state: &mut [u64; 8], block: &[u64; 16]) {
     let k = &K64X2;