diff --git a/src/dynamic.rs b/src/dynamic.rs
index 193280a7..3354e2bf 100644
--- a/src/dynamic.rs
+++ b/src/dynamic.rs
@@ -420,7 +420,7 @@ impl Hash for Dynamic {
 }
 
 /// Map the name of a standard type into a friendly form.
-#[inline]
+#[inline(always)]
 pub(crate) fn map_std_type_name(name: &str) -> &str {
     if name == type_name::<String>() {
         "string"
@@ -1496,7 +1496,7 @@ impl Dynamic {
     }
     /// Convert the [`Dynamic`] into an [`ImmutableString`] and return it.
     /// Returns the name of the actual type if the cast fails.
-    #[inline]
+    #[inline(always)]
     pub fn take_immutable_string(self) -> Result<ImmutableString, &'static str> {
         match self.0 {
             Union::Str(s, _) => Ok(s),
diff --git a/src/engine.rs b/src/engine.rs
index 7f562742..e8ac7b90 100644
--- a/src/engine.rs
+++ b/src/engine.rs
@@ -862,7 +862,7 @@ impl Engine {
     /// Create a new [`Engine`] with minimal built-in functions.
     ///
     /// Use [`register_global_module`][Engine::register_global_module] to add packages of functions.
-    #[inline]
+    #[inline(always)]
     pub fn new_raw() -> Self {
         Self {
             global_namespace: Default::default(),
diff --git a/src/engine_api.rs b/src/engine_api.rs
index ee804636..9ac38a97 100644
--- a/src/engine_api.rs
+++ b/src/engine_api.rs
@@ -1034,7 +1034,6 @@ impl Engine {
     /// Read the contents of a file into a string.
     #[cfg(not(feature = "no_std"))]
     #[cfg(not(any(target_arch = "wasm32", target_arch = "wasm64")))]
-    #[inline]
     fn read_file(path: crate::stdlib::path::PathBuf) -> Result<String, Box<EvalAltResult>> {
         use crate::stdlib::io::Read;
 
@@ -1276,7 +1275,7 @@ impl Engine {
     /// # Ok(())
     /// # }
     /// ```
-    #[inline]
+    #[inline(always)]
     pub fn compile_expression_with_scope(
         &self,
         scope: &Scope,
@@ -1385,7 +1384,7 @@ impl Engine {
     /// # Ok(())
     /// # }
     /// ```
-    #[inline]
+    #[inline(always)]
     pub fn eval_with_scope<T: Variant + Clone>(
         &self,
         scope: &mut Scope,
@@ -1437,7 +1436,7 @@ impl Engine {
     /// # Ok(())
     /// # }
     /// ```
-    #[inline]
+    #[inline(always)]
     pub fn eval_expression_with_scope<T: Variant + Clone>(
         &self,
         scope: &mut Scope,
@@ -1502,7 +1501,7 @@ impl Engine {
     /// # Ok(())
     /// # }
     /// ```
-    #[inline]
+    #[inline(always)]
     pub fn eval_ast_with_scope<T: Variant + Clone>(
         &self,
         scope: &mut Scope,
@@ -1578,7 +1577,7 @@ impl Engine {
     }
     /// Evaluate a string with own scope, but throw away the result and only return error (if any).
     /// Useful for when you don't need the result, but still need to keep track of possible errors.
-    #[inline]
+    #[inline(always)]
     pub fn consume_with_scope(
         &self,
         scope: &mut Scope,
@@ -1659,7 +1658,7 @@ impl Engine {
     /// # }
     /// ```
     #[cfg(not(feature = "no_function"))]
-    #[inline]
+    #[inline(always)]
     pub fn call_fn<T: Variant + Clone>(
         &self,
         scope: &mut Scope,
@@ -1760,7 +1759,7 @@ impl Engine {
     /// Do not use the arguments after this call. If they are needed afterwards,
     /// clone them _before_ calling this function.
     #[cfg(not(feature = "no_function"))]
-    #[inline]
+    #[inline(always)]
     pub(crate) fn call_fn_dynamic_raw(
         &self,
         scope: &mut Scope,
@@ -1814,7 +1813,7 @@ impl Engine {
     /// (i.e. with [`Scope::push_constant`]).
     /// Then, the [`AST`] is cloned and the copy re-optimized before running.
     #[cfg(not(feature = "no_optimize"))]
-    #[inline]
+    #[inline(always)]
     pub fn optimize_ast(
         &self,
         scope: &Scope,
diff --git a/src/fn_call.rs b/src/fn_call.rs
index a9e4c009..18d11447 100644
--- a/src/fn_call.rs
+++ b/src/fn_call.rs
@@ -176,7 +176,7 @@ impl Engine {
     /// 3) Global modules - packages
     /// 4) Imported modules - functions marked with global namespace
     /// 5) Global sub-modules - functions marked with global namespace
-    #[inline]
+    #[inline(always)]
     fn resolve_function<'s>(
         &self,
         mods: &Imports,
@@ -831,7 +831,7 @@ impl Engine {
 
     /// Evaluate a list of statements with no `this` pointer.
     /// This is commonly used to evaluate a list of statements in an [`AST`] or a script function body.
-    #[inline]
+    #[inline(always)]
     pub(crate) fn eval_global_statements(
         &self,
         scope: &mut Scope,
diff --git a/src/fn_register.rs b/src/fn_register.rs
index bba1e46d..48ed4bab 100644
--- a/src/fn_register.rs
+++ b/src/fn_register.rs
@@ -183,7 +183,7 @@ macro_rules! def_register {
             RET: Variant + Clone
         > RegisterFn<FN, ($($mark,)*), RET> for Engine
         {
-            #[inline]
+            #[inline(always)]
             fn register_fn(&mut self, name: &str, f: FN) -> &mut Self {
                 self.global_namespace.set_fn(name, FnNamespace::Global, FnAccess::Public, None,
                     &[$(map_type_id::<$par>()),*],
@@ -198,7 +198,7 @@ macro_rules! def_register {
             FN: Fn($($param),*) -> RhaiResult + SendSync + 'static,
         > RegisterResultFn<FN, ($($mark,)*)> for Engine
         {
-            #[inline]
+            #[inline(always)]
             fn register_result_fn(&mut self, name: &str, f: FN) -> &mut Self {
                 self.global_namespace.set_fn(name, FnNamespace::Global, FnAccess::Public, None,
                     &[$(map_type_id::<$par>()),*],
diff --git a/src/module/mod.rs b/src/module/mod.rs
index 695f8565..0c3a0041 100644
--- a/src/module/mod.rs
+++ b/src/module/mod.rs
@@ -598,7 +598,7 @@ impl Module {
     /// let hash = module.set_fn_0("calc", || Ok(42_i64));
     /// assert!(module.contains_fn(hash, true));
     /// ```
-    #[inline]
+    #[inline(always)]
     pub fn contains_fn(&self, hash_fn: NonZeroU64, public_only: bool) -> bool {
         if public_only {
             self.functions
diff --git a/src/parser.rs b/src/parser.rs
index bfef0a54..96e1da4e 100644
--- a/src/parser.rs
+++ b/src/parser.rs
@@ -105,7 +105,7 @@ impl<'e> ParseState<'e> {
     /// i.e. the top element of the [`ParseState`] is offset 1.
     ///
     /// Return `None` when the variable name is not found in the `stack`.
-    #[inline]
+    #[inline(always)]
     fn access_var(&mut self, name: &str, _pos: Position) -> Option<NonZeroUsize> {
         let mut barrier = false;
 
@@ -230,7 +230,7 @@ impl Expr {
     /// Convert a [`Variable`][Expr::Variable] into a [`Property`][Expr::Property].
     /// All other variants are untouched.
     #[cfg(not(feature = "no_object"))]
-    #[inline]
+    #[inline(always)]
     fn into_property(self, state: &mut ParseState) -> Self {
         match self {
             Self::Variable(x) if x.1.is_none() => {
diff --git a/src/scope.rs b/src/scope.rs
index 4adda3e1..2071a75d 100644
--- a/src/scope.rs
+++ b/src/scope.rs
@@ -237,7 +237,7 @@ impl<'a> Scope<'a> {
         self.push_dynamic_value(name, AccessMode::ReadOnly, value)
     }
     /// Add (push) a new entry with a [`Dynamic`] value to the [`Scope`].
-    #[inline]
+    #[inline(always)]
     pub(crate) fn push_dynamic_value(
         &mut self,
         name: impl Into<Cow<'a, str>>,
@@ -420,7 +420,7 @@ impl<'a> Scope<'a> {
     }
     /// Clone the [`Scope`], keeping only the last instances of each variable name.
     /// Shadowed variables are omitted in the copy.
-    #[inline]
+    #[inline(always)]
     pub(crate) fn clone_visible(&self) -> Self {
         let mut entries: Self = Default::default();
 
diff --git a/src/token.rs b/src/token.rs
index 31c87f30..5cd1cc5c 100644
--- a/src/token.rs
+++ b/src/token.rs
@@ -1029,7 +1029,7 @@ fn scan_block_comment(
 /// # Volatile API
 ///
 /// This function is volatile and may change.
-#[inline]
+#[inline(always)]
 pub fn get_next_token(
     stream: &mut impl InputStream,
     state: &mut TokenizeState,
@@ -1856,7 +1856,7 @@ impl Engine {
         self.lex_raw(input, Some(map))
     }
     /// Tokenize an input text stream with an optional mapping function.
-    #[inline]
+    #[inline(always)]
     pub(crate) fn lex_raw<'a>(
         &'a self,
         input: impl IntoIterator<Item = &'a &'a str>,
diff --git a/src/unsafe.rs b/src/unsafe.rs
index 2cef9997..772eb35a 100644
--- a/src/unsafe.rs
+++ b/src/unsafe.rs
@@ -49,7 +49,7 @@ pub fn unsafe_cast_box<X: Variant, T: Variant>(item: Box<X>) -> Result<Box<T>, B
 ///
 /// Force-casting a local variable's lifetime to the current [`Scope`][crate::Scope]'s larger lifetime saves
 /// on allocations and string cloning, thus avoids us having to maintain a chain of [`Scope`][crate::Scope]'s.
-#[inline]
+#[inline(always)]
 pub fn unsafe_cast_var_name_to_lifetime<'s>(name: &str) -> &'s str {
     // WARNING - force-cast the variable name into the scope's lifetime to avoid cloning it
     //           this is safe because all local variables are cleared at the end of the block