Some changes

src/context.rs

@@ -47,17 +47,15 @@ impl IntoContext for Context {
     }
 
     /// Chains another piece of context that is equal from a hierarchical perspective.
-    // TODO: should this inline? Would the compiler be allowed to fold the allocations into a
-    // single one with inlining?
+    #[inline]
     fn chain(self, other: impl IntoContext) -> Self {
-        let items = match self {
+        Context(ContextInner::Compound(match self {
             Context(ContextInner::Compound(mut items)) => {
                 items.push(other.into_context());
                 items
             }
             _ => vec![self, other.into_context()],
-        };
-        Context(ContextInner::Compound(items))
+        }))
     }
 }
 
@@ -76,8 +74,7 @@ impl IntoContext for &'static str {
 }
 
 impl IntoContext for Cow<'static, str> {
-    // TODO: should this always inline?
-    #[inline]
+    #[inline(always)]
     fn into_context(self) -> Context {
         Context(ContextInner::String(self))
     }

src/lib.rs

@@ -1,6 +1,5 @@
 #![doc = include_str!("../README.md")]
 #![forbid(unsafe_code)]
-#![cfg_attr(feature = "backtrace", feature(backtrace))]
 
 mod sealed;
 pub(crate) use sealed::seal;

src/report.rs

@@ -25,6 +25,7 @@ impl ReportOpts {
         self
     }
 
+    #[inline]
     fn should_indent(&self) -> bool {
         self.was_nl
     }
@@ -37,6 +38,7 @@ macro_rules! report_write {
 }
 pub(crate) use report_write;
 
+#[inline]
 fn write_indent(n: usize, f: &mut impl Write) -> std::fmt::Result {
     for _ in 0..n {
         f.write_str("  ")?;
@@ -54,6 +56,7 @@ impl<T> Report for T
 where
     T: std::fmt::Display,
 {
+    #[inline(never)]
     fn fmt(&self, f: &mut impl Write, opts: &ReportOpts) -> std::fmt::Result {
         use std::fmt::Error;
         struct IndentedWrite<'a, W: Write> {
@@ -64,6 +67,7 @@ where
         where
             W: Write,
         {
+            #[inline]
             fn write_str(&mut self, s: &str) -> Result<(), Error> {
                 // TODO: any room for optimization?
                 // iterates over the lines where each str ends with the line terminator.
@@ -84,6 +88,7 @@ where
                 Ok(())
             }
 
+            #[inline]
             fn write_char(&mut self, c: char) -> Result<(), Error> {
                 self.f.write_char(c)?;
                 if c == '\n' {

src/termination.rs

@@ -8,6 +8,7 @@ pub enum TerminationResult {
 }
 
 impl Termination for TerminationResult {
+    #[inline]
     fn report(self) -> ExitCode {
         match self {
             Self::Ok => ExitCode::SUCCESS,
@@ -22,6 +23,7 @@ impl Termination for TerminationResult {
 }
 
 impl From<Result<(), How>> for TerminationResult {
+    #[inline]
     fn from(value: Result<(), How>) -> Self {
         match value {
             Ok(()) => Self::Ok,