diff --git a/crates/oxc_transformer/src/jsx/diagnostics.rs b/crates/oxc_transformer/src/jsx/diagnostics.rs
index cfc896ca8d3ce..b09f5b4f7786d 100644
--- a/crates/oxc_transformer/src/jsx/diagnostics.rs
+++ b/crates/oxc_transformer/src/jsx/diagnostics.rs
@@ -1,31 +1,37 @@
 use oxc_diagnostics::OxcDiagnostic;
 use oxc_span::Span;
 
+#[cold]
 pub fn pragma_and_pragma_frag_cannot_be_set() -> OxcDiagnostic {
     OxcDiagnostic::warn("pragma and pragmaFrag cannot be set when runtime is automatic.")
         .with_help("Remove `pragma` and `pragmaFrag` options.")
 }
 
+#[cold]
 pub fn invalid_pragma() -> OxcDiagnostic {
     OxcDiagnostic::warn("pragma and pragmaFrag must be of the form `foo` or `foo.bar`.")
         .with_help("Fix `pragma` and `pragmaFrag` options.")
 }
 
+#[cold]
 pub fn import_source_cannot_be_set() -> OxcDiagnostic {
     OxcDiagnostic::warn("importSource cannot be set when runtime is classic.")
         .with_help("Remove `importSource` option.")
 }
 
+#[cold]
 pub fn invalid_import_source() -> OxcDiagnostic {
     OxcDiagnostic::warn("importSource cannot be an empty string or longer than u32::MAX bytes")
         .with_help("Fix `importSource` option.")
 }
 
+#[cold]
 pub fn namespace_does_not_support(span: Span) -> OxcDiagnostic {
     OxcDiagnostic::warn("Namespace tags are not supported by default. React's JSX doesn't support namespace tags. You can set `throwIfNamespace: false` to bypass this warning.")
         .with_label(span)
 }
 
+#[cold]
 pub fn valueless_key(span: Span) -> OxcDiagnostic {
     OxcDiagnostic::warn("Please provide an explicit key value. Using \"key\" as a shorthand for \"key={true}\" is not allowed.")
         .with_label(span)
diff --git a/crates/oxc_transformer/src/typescript/diagnostics.rs b/crates/oxc_transformer/src/typescript/diagnostics.rs
index 200316a3be929..e1028d10d8f1a 100644
--- a/crates/oxc_transformer/src/typescript/diagnostics.rs
+++ b/crates/oxc_transformer/src/typescript/diagnostics.rs
@@ -1,6 +1,7 @@
 use oxc_diagnostics::OxcDiagnostic;
 use oxc_span::Span;
 
+#[cold]
 pub fn import_equals_cannot_be_used_in_esm(span: Span) -> OxcDiagnostic {
     OxcDiagnostic::warn("Import assignment cannot be used when targeting ECMAScript modules.")
         .with_help(
@@ -11,6 +12,7 @@ pub fn import_equals_cannot_be_used_in_esm(span: Span) -> OxcDiagnostic {
         .with_error_code("TS", "1202")
 }
 
+#[cold]
 pub fn export_assignment_cannot_bed_used_in_esm(span: Span) -> OxcDiagnostic {
     OxcDiagnostic::warn("Export assignment cannot be used when targeting ECMAScript modules.")
         .with_help("Consider using 'export default' or another module format instead.")
@@ -18,16 +20,19 @@ pub fn export_assignment_cannot_bed_used_in_esm(span: Span) -> OxcDiagnostic {
         .with_error_code("TS", "1203")
 }
 
+#[cold]
 pub fn ambient_module_nested(span: Span) -> OxcDiagnostic {
     OxcDiagnostic::warn("Ambient modules cannot be nested in other modules or namespaces.")
         .with_label(span)
 }
 
+#[cold]
 pub fn namespace_exporting_non_const(span: Span) -> OxcDiagnostic {
     OxcDiagnostic::warn("Namespaces exporting non-const are not supported by Babel. Change to const or see: https://babeljs.io/docs/en/babel-plugin-transform-typescript")
         .with_label(span)
 }
 
+#[cold]
 pub fn namespace_not_supported(span: Span) -> OxcDiagnostic {
     OxcDiagnostic::warn("Namespace not marked type-only declare. Non-declarative namespaces are only supported experimentally in Babel. To enable and review caveats see: https://babeljs.io/docs/en/babel-plugin-transform-typescript")
         .with_label(span)