diff --git a/bindgen-tests/tests/expectations/tests/derive-bitfield-method-same-name.rs b/bindgen-tests/tests/expectations/tests/derive-bitfield-method-same-name.rs
index c8f19bc5af..05e66a72bc 100644
--- a/bindgen-tests/tests/expectations/tests/derive-bitfield-method-same-name.rs
+++ b/bindgen-tests/tests/expectations/tests/derive-bitfield-method-same-name.rs
@@ -136,12 +136,18 @@ impl ::std::fmt::Debug for Foo {
         write!(
             f,
             "Foo {{ large: [{}], type_ : {:?},  }}",
-            self
-                .large
-                .iter()
-                .enumerate()
-                .map(|(i, v)| format!("{}{:?}", if i > 0 { ", " } else { "" }, v))
-                .collect::<String>(),
+            {
+                use std::fmt::Write as _;
+                let mut output = String::new();
+                let mut iter = self.large.iter();
+                if let Some(value) = iter.next() {
+                    let _ = write!(output, "{value:?}");
+                    for value in iter {
+                        let _ = write!(output, ", {value:?}");
+                    }
+                }
+                output
+            },
             self.type__bindgen_bitfield(),
         )
     }
diff --git a/bindgen-tests/tests/expectations/tests/derive-debug-bitfield.rs b/bindgen-tests/tests/expectations/tests/derive-debug-bitfield.rs
index 20c7cf0c88..e266880509 100644
--- a/bindgen-tests/tests/expectations/tests/derive-debug-bitfield.rs
+++ b/bindgen-tests/tests/expectations/tests/derive-debug-bitfield.rs
@@ -122,12 +122,18 @@ impl ::std::fmt::Debug for C {
             "C {{ a : {:?}, b : {:?}, large_array: [{}] }}",
             self.a(),
             self.b(),
-            self
-                .large_array
-                .iter()
-                .enumerate()
-                .map(|(i, v)| format!("{}{:?}", if i > 0 { ", " } else { "" }, v))
-                .collect::<String>(),
+            {
+                use std::fmt::Write as _;
+                let mut output = String::new();
+                let mut iter = self.large_array.iter();
+                if let Some(value) = iter.next() {
+                    let _ = write!(output, "{value:?}");
+                    for value in iter {
+                        let _ = write!(output, ", {value:?}");
+                    }
+                }
+                output
+            },
         )
     }
 }
diff --git a/bindgen-tests/tests/expectations/tests/derive-debug-function-pointer.rs b/bindgen-tests/tests/expectations/tests/derive-debug-function-pointer.rs
index 9077201a77..9fe1f5518c 100644
--- a/bindgen-tests/tests/expectations/tests/derive-debug-function-pointer.rs
+++ b/bindgen-tests/tests/expectations/tests/derive-debug-function-pointer.rs
@@ -40,12 +40,18 @@ impl ::std::fmt::Debug for Nice {
             f,
             "Nice {{ pointer: {:?}, large_array: [{}] }}",
             self.pointer,
-            self
-                .large_array
-                .iter()
-                .enumerate()
-                .map(|(i, v)| format!("{}{:?}", if i > 0 { ", " } else { "" }, v))
-                .collect::<String>(),
+            {
+                use std::fmt::Write as _;
+                let mut output = String::new();
+                let mut iter = self.large_array.iter();
+                if let Some(value) = iter.next() {
+                    let _ = write!(output, "{value:?}");
+                    for value in iter {
+                        let _ = write!(output, ", {value:?}");
+                    }
+                }
+                output
+            },
         )
     }
 }
diff --git a/bindgen/codegen/impl_debug.rs b/bindgen/codegen/impl_debug.rs
index c4daddf260..319c89b58e 100644
--- a/bindgen/codegen/impl_debug.rs
+++ b/bindgen/codegen/impl_debug.rs
@@ -186,13 +186,18 @@ impl<'a> ImplDebug<'a> for Item {
                     // Let's implement our own print function
                     Some((
                         format!("{name}: [{{}}]"),
-                        vec![quote! {
-                            self.#name_ident
-                                .iter()
-                                .enumerate()
-                                .map(|(i, v)| format!("{}{:?}", if i > 0 { ", " } else { "" }, v))
-                                .collect::<String>()
-                        }],
+                        vec![quote! {{
+                            use std::fmt::Write as _;
+                            let mut output = String::new();
+                            let mut iter = self.#name_ident.iter();
+                            if let Some(value) = iter.next() {
+                                let _ = write!(output, "{value:?}");
+                                for value in iter {
+                                    let _ = write!(output, ", {value:?}");
+                                }
+                            }
+                            output
+                        }}],
                     ))
                 }
             }