diff --git a/derive_macro/src/lib.rs b/derive_macro/src/lib.rs
index 681e43f..a91c9cc 100644
--- a/derive_macro/src/lib.rs
+++ b/derive_macro/src/lib.rs
@@ -25,9 +25,11 @@ fn derive_struct(name: Ident, data: &DataStruct) -> Result<TokenStream, std::fmt
 
     writeln!(&mut output, "#[automatically_derived]")?;
     writeln!(&mut output, "impl otw::OverTheWire for {name} {{")?;
+    writeln!(&mut output, "    #[inline(always)]")?;
     writeln!(&mut output, "    fn serialize<T: otw::Writer>(&self, writer: &mut T) -> e::Result<()> {{")?;
     wsf(&mut output, "        ", Some("self"), &data.fields)?;
     writeln!(&mut output, "    }}")?;
+    writeln!(&mut output, "    #[inline(always)]")?;
     writeln!(&mut output, "    fn deserialize<T: otw::Reader>(reader: &mut T) -> e::Result<Self> {{")?;
     wdf(&mut output, "        ", tname.as_str(), &data.fields)?;
     writeln!(&mut output, "    }}")?;
@@ -47,6 +49,7 @@ fn derive_enum(name: Ident, data: &DataEnum) -> Result<TokenStream, std::fmt::Er
 
     writeln!(&mut output, "#[automatically_derived]")?;
     writeln!(&mut output, "impl otw::OverTheWire for {name} {{")?;
+    writeln!(&mut output, "    #[inline(always)]")?;
     writeln!(&mut output, "    fn serialize<T: otw::Writer>(&self, writer: &mut T) -> e::Result<()> {{")?;
     writeln!(&mut output, "        match self {{")?;
 
@@ -91,6 +94,7 @@ fn derive_enum(name: Ident, data: &DataEnum) -> Result<TokenStream, std::fmt::Er
     writeln!(&mut output, "    }}")?;
     
     //╶───╴Deserialize╶──────────────────────────────────────────────────────────╴
+    writeln!(&mut output, "    #[inline(always)]")?;
     writeln!(&mut output, "    fn deserialize<T: otw::Reader>(reader: &mut T) -> e::Result<Self> {{")?;
     writeln!(&mut output, "        match <u8 as otw::OverTheWire>::deserialize(reader)? {{")?;