diff --git a/benches/scripts/intl/collator-compare.js b/benches/scripts/intl/collator-compare.js
new file mode 100644
index 00000000000..ffbe97e74e1
--- /dev/null
+++ b/benches/scripts/intl/collator-compare.js
@@ -0,0 +1,8 @@
+const kIterationCount = 1000;
+const collator = new Intl.Collator("en");
+
+function main() {
+  for (let i = 0; i < kIterationCount; i++) {
+    collator.compare("apple", "banana");
+  }
+}
diff --git a/benches/scripts/intl/collator-construction.js b/benches/scripts/intl/collator-construction.js
new file mode 100644
index 00000000000..423eff34343
--- /dev/null
+++ b/benches/scripts/intl/collator-construction.js
@@ -0,0 +1,10 @@
+const kIterationCount = 100;
+const locales = ["en", "de", "ja", "ar", "fr", "es", "zh"];
+
+function main() {
+  for (let i = 0; i < kIterationCount; i++) {
+    for (const locale of locales) {
+      new Intl.Collator(locale);
+    }
+  }
+}
diff --git a/benches/scripts/intl/datetimeformat-construction.js b/benches/scripts/intl/datetimeformat-construction.js
new file mode 100644
index 00000000000..d1796f0d744
--- /dev/null
+++ b/benches/scripts/intl/datetimeformat-construction.js
@@ -0,0 +1,10 @@
+const kIterationCount = 100;
+const locales = ["en", "de", "ja", "ar", "fr", "es", "zh"];
+
+function main() {
+  for (let i = 0; i < kIterationCount; i++) {
+    for (const locale of locales) {
+      new Intl.DateTimeFormat(locale);
+    }
+  }
+}
diff --git a/benches/scripts/intl/datetimeformat-format.js b/benches/scripts/intl/datetimeformat-format.js
new file mode 100644
index 00000000000..43252405068
--- /dev/null
+++ b/benches/scripts/intl/datetimeformat-format.js
@@ -0,0 +1,9 @@
+const kIterationCount = 1000;
+const dtf = new Intl.DateTimeFormat("en");
+const date = new Date(2024, 0, 1);
+
+function main() {
+  for (let i = 0; i < kIterationCount; i++) {
+    dtf.format(date);
+  }
+}
diff --git a/benches/scripts/intl/datetimeformat-with-options.js b/benches/scripts/intl/datetimeformat-with-options.js
new file mode 100644
index 00000000000..f670927bf22
--- /dev/null
+++ b/benches/scripts/intl/datetimeformat-with-options.js
@@ -0,0 +1,16 @@
+const kIterationCount = 100;
+
+function main() {
+  for (let i = 0; i < kIterationCount; i++) {
+    new Intl.DateTimeFormat("en", {
+      year: "numeric",
+      month: "long",
+      day: "numeric",
+    });
+    new Intl.DateTimeFormat("en", {
+      hour: "2-digit",
+      minute: "2-digit",
+      second: "2-digit",
+    });
+  }
+}
diff --git a/benches/scripts/intl/listformat-construction.js b/benches/scripts/intl/listformat-construction.js
new file mode 100644
index 00000000000..67f779fbbce
--- /dev/null
+++ b/benches/scripts/intl/listformat-construction.js
@@ -0,0 +1,10 @@
+const kIterationCount = 100;
+const locales = ["en", "de", "ja", "ar", "fr", "es", "zh"];
+
+function main() {
+  for (let i = 0; i < kIterationCount; i++) {
+    for (const locale of locales) {
+      new Intl.ListFormat(locale);
+    }
+  }
+}
diff --git a/benches/scripts/intl/listformat-format.js b/benches/scripts/intl/listformat-format.js
new file mode 100644
index 00000000000..6d6d3cae337
--- /dev/null
+++ b/benches/scripts/intl/listformat-format.js
@@ -0,0 +1,9 @@
+const kIterationCount = 1000;
+const lf = new Intl.ListFormat("en");
+const list = ["apple", "banana", "cherry"];
+
+function main() {
+  for (let i = 0; i < kIterationCount; i++) {
+    lf.format(list);
+  }
+}
diff --git a/benches/scripts/intl/numberformat-construction.js b/benches/scripts/intl/numberformat-construction.js
new file mode 100644
index 00000000000..6fcdcb56e51
--- /dev/null
+++ b/benches/scripts/intl/numberformat-construction.js
@@ -0,0 +1,10 @@
+const kIterationCount = 100;
+const locales = ["en", "de", "ja", "ar", "fr", "es", "zh"];
+
+function main() {
+  for (let i = 0; i < kIterationCount; i++) {
+    for (const locale of locales) {
+      new Intl.NumberFormat(locale);
+    }
+  }
+}
diff --git a/benches/scripts/intl/numberformat-different-options.js b/benches/scripts/intl/numberformat-different-options.js
new file mode 100644
index 00000000000..c424782caf7
--- /dev/null
+++ b/benches/scripts/intl/numberformat-different-options.js
@@ -0,0 +1,9 @@
+const kIterationCount = 100;
+
+function main() {
+  for (let i = 0; i < kIterationCount; i++) {
+    new Intl.NumberFormat("en", { style: "currency", currency: "USD" });
+    new Intl.NumberFormat("en", { style: "percent" });
+    new Intl.NumberFormat("en", { notation: "scientific" });
+  }
+}
diff --git a/benches/scripts/intl/pluralrules-construction.js b/benches/scripts/intl/pluralrules-construction.js
new file mode 100644
index 00000000000..481df5c94cd
--- /dev/null
+++ b/benches/scripts/intl/pluralrules-construction.js
@@ -0,0 +1,10 @@
+const kIterationCount = 100;
+const locales = ["en", "de", "ja", "ar", "fr", "es", "zh"];
+
+function main() {
+  for (let i = 0; i < kIterationCount; i++) {
+    for (const locale of locales) {
+      new Intl.PluralRules(locale);
+    }
+  }
+}
diff --git a/benches/scripts/intl/pluralrules-select.js b/benches/scripts/intl/pluralrules-select.js
new file mode 100644
index 00000000000..5ab62c4dcb6
--- /dev/null
+++ b/benches/scripts/intl/pluralrules-select.js
@@ -0,0 +1,8 @@
+const kIterationCount = 1000;
+const pr = new Intl.PluralRules("en");
+
+function main() {
+  for (let i = 0; i < kIterationCount; i++) {
+    pr.select(i);
+  }
+}
diff --git a/benches/scripts/intl/segmenter-construction.js b/benches/scripts/intl/segmenter-construction.js
new file mode 100644
index 00000000000..ba39b2f7403
--- /dev/null
+++ b/benches/scripts/intl/segmenter-construction.js
@@ -0,0 +1,10 @@
+const kIterationCount = 100;
+const locales = ["en", "de", "ja", "ar", "fr", "es", "zh"];
+
+function main() {
+  for (let i = 0; i < kIterationCount; i++) {
+    for (const locale of locales) {
+      new Intl.Segmenter(locale);
+    }
+  }
+}
diff --git a/benches/scripts/intl/segmenter-segment.js b/benches/scripts/intl/segmenter-segment.js
new file mode 100644
index 00000000000..d48234beec1
--- /dev/null
+++ b/benches/scripts/intl/segmenter-segment.js
@@ -0,0 +1,9 @@
+const kIterationCount = 100;
+const segmenter = new Intl.Segmenter("en");
+const text = "The quick brown fox jumps over the lazy dog.";
+
+function main() {
+  for (let i = 0; i < kIterationCount; i++) {
+    [...segmenter.segment(text)];
+  }
+}
diff --git a/core/engine/src/builtins/intl/date_time_format/mod.rs b/core/engine/src/builtins/intl/date_time_format/mod.rs
index a022aff0974..b5a06559b27 100644
--- a/core/engine/src/builtins/intl/date_time_format/mod.rs
+++ b/core/engine/src/builtins/intl/date_time_format/mod.rs
@@ -79,6 +79,7 @@ impl FormatTimeZone {
 /// JavaScript `Intl.DateTimeFormat` object.
 #[derive(Debug, Clone, Trace, Finalize, JsData)]
 #[boa_gc(unsafe_empty_trace)] // Safety: No traceable types
+#[allow(dead_code)]
 pub(crate) struct DateTimeFormat {
     locale: Locale,
     calendar_algorithm: Option<CalendarAlgorithm>, // TODO: Potentially remove ?
@@ -88,6 +89,7 @@ pub(crate) struct DateTimeFormat {
     time_style: Option<TimeStyle>,
     time_zone: FormatTimeZone,
     fieldset: CompositeFieldSet,
+    formatter: DateTimeFormatter<CompositeFieldSet>,
     bound_format: Option<JsFunction>,
 }
 
@@ -268,15 +270,7 @@ impl DateTimeFormat {
                         // information about the specified calendar.
                         let fields = ToLocalTime::from_local_epoch_milliseconds(tz)?;
 
-                        let formatter = DateTimeFormatter::try_new_with_buffer_provider(
-                            context.intl_provider().erased_provider(),
-                            dtf.borrow().data().locale.clone().into(),
-                            dtf.borrow().data().fieldset,
-                        )
-                        .map_err(|e| {
-                            JsNativeError::range()
-                                .with_message(format!("failed to load formatter: {e}"))
-                        })?;
+                        let formatter = dtf.borrow().data().formatter.clone();
 
                         let dt = fields.to_formattable_datetime();
                         let tz_info = dtf.borrow().data().time_zone.to_time_zone_info();
@@ -785,6 +779,13 @@ fn create_date_time_format(
     // 33. If bestFormat has a field [[hour]], then
     // a. Set dateTimeFormat.[[HourCycle]] to hc.
     // 34. Return dateTimeFormat.
+    let formatter = DateTimeFormatter::try_new_with_buffer_provider(
+        context.intl_provider().erased_provider(),
+        resolved_locale.clone().into(),
+        fieldset,
+    )
+    .map_err(|e| JsNativeError::range().with_message(format!("failed to load formatter: {e}")))?;
+
     Ok(JsObject::from_proto_and_data(
         prototype,
         DateTimeFormat {
@@ -796,6 +797,7 @@ fn create_date_time_format(
             time_style,
             time_zone,
             fieldset,
+            formatter,
             bound_format: None,
         },
     ))