1 files changed, 15 insertions, 4 deletions

diff --git a/src/error.rs b/src/error.rs
index f4f5bc2..3fa0835 100644
--- a/src/error.rs
+++ b/src/error.rs
@@ -25,6 +25,7 @@ impl Error {
     /// created here to ensure that a backtrace exists.
     #[cfg(feature = "std")]
     #[cfg_attr(doc_cfg, doc(cfg(feature = "std")))]
+    #[cold]
     pub fn new<E>(error: E) -> Self
     where
         E: StdError + Send + Sync + 'static,
@@ -70,6 +71,7 @@ impl Error {
     ///         .await
     /// }
     /// ```
+    #[cold]
     pub fn msg<M>(message: M) -> Self
     where
         M: Display + Debug + Send + Sync + 'static,
@@ -78,6 +80,7 @@ impl Error {
     }
 
     #[cfg(feature = "std")]
+    #[cold]
     pub(crate) fn from_std<E>(error: E, backtrace: Option<Backtrace>) -> Self
     where
         E: StdError + Send + Sync + 'static,
@@ -100,6 +103,7 @@ impl Error {
         unsafe { Error::construct(error, vtable, backtrace) }
     }
 
+    #[cold]
     pub(crate) fn from_adhoc<M>(message: M, backtrace: Option<Backtrace>) -> Self
     where
         M: Display + Debug + Send + Sync + 'static,
@@ -125,6 +129,7 @@ impl Error {
         unsafe { Error::construct(error, vtable, backtrace) }
     }
 
+    #[cold]
     pub(crate) fn from_display<M>(message: M, backtrace: Option<Backtrace>) -> Self
     where
         M: Display + Send + Sync + 'static,
@@ -151,6 +156,7 @@ impl Error {
     }
 
     #[cfg(feature = "std")]
+    #[cold]
     pub(crate) fn from_context<C, E>(context: C, error: E, backtrace: Option<Backtrace>) -> Self
     where
         C: Display + Send + Sync + 'static,
@@ -177,6 +183,7 @@ impl Error {
     }
 
     #[cfg(feature = "std")]
+    #[cold]
     pub(crate) fn from_boxed(
         error: Box<dyn StdError + Send + Sync>,
         backtrace: Option<Backtrace>,
@@ -207,6 +214,7 @@ impl Error {
     //
     // Unsafe because the given vtable must have sensible behavior on the error
     // value of type E.
+    #[cold]
     unsafe fn construct<E>(
         error: E,
         vtable: &'static ErrorVTable,
@@ -284,6 +292,7 @@ impl Error {
     ///     })
     /// }
     /// ```
+    #[cold]
     pub fn context<C>(self, context: C) -> Self
     where
         C: Display + Send + Sync + 'static,
@@ -373,6 +382,7 @@ impl Error {
     /// ```
     #[cfg(feature = "std")]
     #[cfg_attr(doc_cfg, doc(cfg(feature = "std")))]
+    #[cold]
     pub fn chain(&self) -> Chain {
         unsafe { ErrorImpl::chain(self.inner.by_ref()) }
     }
@@ -515,6 +525,7 @@ impl<E> From<E> for Error
 where
     E: StdError + Send + Sync + 'static,
 {
+    #[cold]
     fn from(error: E) -> Self {
         let backtrace = backtrace_if_absent!(error);
         Error::from_std(error, backtrace)
@@ -741,12 +752,11 @@ unsafe fn context_chain_downcast<C>(e: Ref<ErrorImpl>, target: TypeId) -> Option
 where
     C: 'static,
 {
+    let unerased = e.cast::<ErrorImpl<ContextError<C, Error>>>().deref();
     if TypeId::of::<C>() == target {
-        let unerased = e.cast::<ErrorImpl<ContextError<C, Error>>>().deref();
         Some(Ref::new(&unerased._object.context).cast::<()>())
     } else {
         // Recurse down the context chain per the inner error's vtable.
-        let unerased = e.cast::<ErrorImpl<ContextError<C, Error>>>().deref();
         let source = &unerased._object.error;
         (vtable(source.inner.ptr).object_downcast)(source.inner.by_ref(), target)
     }
@@ -758,12 +768,11 @@ unsafe fn context_chain_downcast_mut<C>(e: Mut<ErrorImpl>, target: TypeId) -> Op
 where
     C: 'static,
 {
+    let unerased = e.cast::<ErrorImpl<ContextError<C, Error>>>().deref_mut();
     if TypeId::of::<C>() == target {
-        let unerased = e.cast::<ErrorImpl<ContextError<C, Error>>>().deref_mut();
         Some(Mut::new(&mut unerased._object.context).cast::<()>())
     } else {
         // Recurse down the context chain per the inner error's vtable.
-        let unerased = e.cast::<ErrorImpl<ContextError<C, Error>>>().deref_mut();
         let source = &mut unerased._object.error;
         (vtable(source.inner.ptr).object_downcast_mut)(source.inner.by_mut(), target)
     }
@@ -881,6 +890,7 @@ impl ErrorImpl {
             .expect("backtrace capture failed")
     }
 
+    #[cold]
     pub(crate) unsafe fn chain(this: Ref<Self>) -> Chain {
         Chain::new(Self::error(this))
     }
@@ -919,6 +929,7 @@ where
 }
 
 impl From<Error> for Box<dyn StdError + Send + Sync + 'static> {
+    #[cold]
     fn from(error: Error) -> Self {
         let outer = ManuallyDrop::new(error);
         unsafe {