diff --git a/components/script/dom/document.rs b/components/script/dom/document.rs
index 68efa07537c..23d4cfa4fce 100644
--- a/components/script/dom/document.rs
+++ b/components/script/dom/document.rs
@@ -1086,6 +1086,11 @@ impl Document {
 
     // https://html.spec.whatwg.org/multipage/#current-document-readiness
     pub(crate) fn set_ready_state(&self, state: DocumentReadyState, can_gc: CanGc) {
+        let window = self.window();
+        let performance = window.Performance();
+        let now = (*performance.Now()).floor() as u64;
+        let timing = performance.Timing();
+
         match state {
             DocumentReadyState::Loading => {
                 if self.window().is_top_level() {
@@ -1095,6 +1100,11 @@ impl Document {
                     ));
                     self.send_to_embedder(EmbedderMsg::Status(self.webview_id(), None));
                 }
+                timing.update_dom_loading(now);
+            },
+            DocumentReadyState::Interactive => {
+                update_with_current_instant(&self.dom_interactive);
+                timing.update_dom_interactive(now);
             },
             DocumentReadyState::Complete => {
                 if self.window().is_top_level() {
@@ -1104,8 +1114,8 @@ impl Document {
                     ));
                 }
                 update_with_current_instant(&self.dom_complete);
+                timing.update_dom_complete(now);
             },
-            DocumentReadyState::Interactive => update_with_current_instant(&self.dom_interactive),
         };
 
         self.ready_state.set(state);
@@ -2987,6 +2997,10 @@ impl Document {
                 if document.browsing_context().is_none() {
                     return;
                 }
+
+                let performance = window.Performance();
+                let timing = performance.Timing();
+
                 let event = Event::new(
                     window.upcast(),
                     atom!("load"),
@@ -2996,12 +3010,16 @@ impl Document {
                 );
                 event.set_trusted(true);
 
+                let start_time = (*performance.Now()).floor() as u64;
+                timing.update_load_event_start(start_time);
+
                 // http://w3c.github.io/navigation-timing/#widl-PerformanceNavigationTiming-loadEventStart
                 update_with_current_instant(&document.load_event_start);
 
                 debug!("About to dispatch load for {:?}", document.url());
                 window.dispatch_event_with_target_override(&event, CanGc::note());
 
+                timing.update_load_event_end((*performance.Now()).floor() as u64);
                 // http://w3c.github.io/navigation-timing/#widl-PerformanceNavigationTiming-loadEventEnd
                 update_with_current_instant(&document.load_event_end);
 
@@ -3243,20 +3261,25 @@ impl Document {
             "Complete before DOMContentLoaded?"
         );
 
-        update_with_current_instant(&self.dom_content_loaded_event_start);
-
         // Step 4.1.
         let document = Trusted::new(self);
         self.owner_global()
             .task_manager()
             .dom_manipulation_task_source()
-            .queue(
-                task!(fire_dom_content_loaded_event: move || {
-                let document = document.root();
-                document.upcast::<EventTarget>().fire_bubbling_event(atom!("DOMContentLoaded"), CanGc::note());
-                update_with_current_instant(&document.dom_content_loaded_event_end);
-                })
-            );
+            .queue(task!(fire_dom_content_loaded_event: move || {
+            let document = document.root();
+
+            let window = document.window();
+            let performance = window.Performance();
+            let timing = performance.Timing();
+
+            update_with_current_instant(&document.dom_content_loaded_event_start);
+            timing.update_dom_content_loaded_event_start((*performance.Now()).floor() as u64);
+            document.upcast::<EventTarget>().fire_bubbling_event(atom!("DOMContentLoaded"), CanGc::note());
+            timing.update_dom_content_loaded_event_end((*performance.Now()).floor() as u64);
+
+            update_with_current_instant(&document.dom_content_loaded_event_end);
+            }));
 
         // html parsing has finished - set dom content loaded
         self.interactive_time
diff --git a/components/script/dom/mod.rs b/components/script/dom/mod.rs
index 5d7f1966207..243b6794f8c 100644
--- a/components/script/dom/mod.rs
+++ b/components/script/dom/mod.rs
@@ -484,6 +484,7 @@ pub(crate) mod performanceobserver;
 pub(crate) mod performanceobserverentrylist;
 pub(crate) mod performancepainttiming;
 pub(crate) mod performanceresourcetiming;
+pub(crate) mod performancetiming;
 pub(crate) mod permissions;
 pub(crate) mod permissionstatus;
 pub(crate) mod plugin;
diff --git a/components/script/dom/performance.rs b/components/script/dom/performance.rs
index 7d4021ea801..322213b7196 100644
--- a/components/script/dom/performance.rs
+++ b/components/script/dom/performance.rs
@@ -19,7 +19,7 @@ use crate::dom::bindings::error::{Error, Fallible};
 use crate::dom::bindings::inheritance::Castable;
 use crate::dom::bindings::num::Finite;
 use crate::dom::bindings::reflector::{DomGlobal, reflect_dom_object};
-use crate::dom::bindings::root::DomRoot;
+use crate::dom::bindings::root::{Dom, DomRoot};
 use crate::dom::bindings::str::DOMString;
 use crate::dom::eventtarget::EventTarget;
 use crate::dom::globalscope::GlobalScope;
@@ -27,8 +27,8 @@ use crate::dom::performanceentry::PerformanceEntry;
 use crate::dom::performancemark::PerformanceMark;
 use crate::dom::performancemeasure::PerformanceMeasure;
 use crate::dom::performancenavigation::PerformanceNavigation;
-use crate::dom::performancenavigationtiming::PerformanceNavigationTiming;
 use crate::dom::performanceobserver::PerformanceObserver as DOMPerformanceObserver;
+use crate::dom::performancetiming::PerformanceTiming;
 use crate::dom::window::Window;
 use crate::script_runtime::CanGc;
 
@@ -148,10 +148,23 @@ pub(crate) struct Performance {
     resource_timing_buffer_current_size: Cell<usize>,
     resource_timing_buffer_pending_full_event: Cell<bool>,
     resource_timing_secondary_entries: DomRefCell<VecDeque<DomRoot<PerformanceEntry>>>,
+    timing: Dom<PerformanceTiming>,
+    navigation: Dom<PerformanceNavigation>,
 }
 
 impl Performance {
-    fn new_inherited(time_origin: CrossProcessInstant) -> Performance {
+    fn time_origin_to_millis(time_origin: CrossProcessInstant) -> u64 {
+        (time_origin - CrossProcessInstant::epoch()).whole_milliseconds() as u64
+    }
+
+    fn new_inherited(
+        global: &GlobalScope,
+        time_origin: CrossProcessInstant,
+        can_gc: CanGc,
+    ) -> Performance {
+        let nav_start = Self::time_origin_to_millis(time_origin);
+        let timing = PerformanceTiming::new(global, nav_start, can_gc);
+        let navigation = PerformanceNavigation::new(global, can_gc);
         Performance {
             eventtarget: EventTarget::new_inherited(),
             buffer: DomRefCell::new(PerformanceEntryList::new(Vec::new())),
@@ -162,6 +175,8 @@ impl Performance {
             resource_timing_buffer_current_size: Cell::new(0),
             resource_timing_buffer_pending_full_event: Cell::new(false),
             resource_timing_secondary_entries: DomRefCell::new(VecDeque::new()),
+            timing: Dom::from_ref(&*timing),
+            navigation: Dom::from_ref(&*navigation),
         }
     }
 
@@ -171,7 +186,7 @@ impl Performance {
         can_gc: CanGc,
     ) -> DomRoot<Performance> {
         reflect_dom_object(
-            Box::new(Performance::new_inherited(navigation_start)),
+            Box::new(Performance::new_inherited(global, navigation_start, can_gc)),
             global,
             can_gc,
         )
@@ -433,21 +448,13 @@ impl Performance {
 impl PerformanceMethods<crate::DomTypeHolder> for Performance {
     // FIXME(avada): this should be deprecated in the future, but some sites still use it
     // https://dvcs.w3.org/hg/webperf/raw-file/tip/specs/NavigationTiming/Overview.html#performance-timing-attribute
-    fn Timing(&self) -> DomRoot<PerformanceNavigationTiming> {
-        let entries = self.GetEntriesByType(DOMString::from("navigation"));
-        if !entries.is_empty() {
-            return DomRoot::from_ref(
-                entries[0]
-                    .downcast::<PerformanceNavigationTiming>()
-                    .unwrap(),
-            );
-        }
-        unreachable!("Are we trying to expose Performance.timing in workers?");
+    fn Timing(&self) -> DomRoot<PerformanceTiming> {
+        DomRoot::from_ref(&*self.timing)
     }
 
     // https://w3c.github.io/navigation-timing/#dom-performance-navigation
     fn Navigation(&self) -> DomRoot<PerformanceNavigation> {
-        PerformanceNavigation::new(&self.global(), CanGc::note())
+        DomRoot::from_ref(&*self.navigation)
     }
 
     // https://dvcs.w3.org/hg/webperf/raw-file/tip/specs/HighResolutionTime/Overview.html#dom-performance-now
diff --git a/components/script/dom/performancetiming.rs b/components/script/dom/performancetiming.rs
new file mode 100644
index 00000000000..4ef80ebde7d
--- /dev/null
+++ b/components/script/dom/performancetiming.rs
@@ -0,0 +1,253 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
+
+use std::cell::Cell;
+
+use dom_struct::dom_struct;
+
+use crate::dom::bindings::codegen::Bindings::PerformanceTimingBinding::PerformanceTimingMethods;
+use crate::dom::bindings::reflector::{Reflector, reflect_dom_object};
+use crate::dom::bindings::root::DomRoot;
+use crate::dom::globalscope::GlobalScope;
+use crate::script_runtime::CanGc;
+
+#[dom_struct]
+pub(crate) struct PerformanceTiming {
+    reflector_: Reflector,
+    navigation_start: Cell<u64>,
+    unload_event_start: Cell<u64>,
+    unload_event_end: Cell<u64>,
+    redirect_start: Cell<u64>,
+    redirect_end: Cell<u64>,
+    fetch_start: Cell<u64>,
+    domain_lookup_start: Cell<u64>,
+    domain_lookup_end: Cell<u64>,
+    connect_start: Cell<u64>,
+    connect_end: Cell<u64>,
+    secure_connection_start: Cell<u64>,
+    request_start: Cell<u64>,
+    response_start: Cell<u64>,
+    response_end: Cell<u64>,
+    dom_loading: Cell<u64>,
+    dom_interactive: Cell<u64>,
+    dom_content_loaded_event_start: Cell<u64>,
+    dom_content_loaded_event_end: Cell<u64>,
+    dom_complete: Cell<u64>,
+    load_event_start: Cell<u64>,
+    load_event_end: Cell<u64>,
+}
+
+#[allow(dead_code)]
+impl PerformanceTiming {
+    pub fn new(
+        global: &GlobalScope,
+        navigation_start: u64,
+        can_gc: CanGc,
+    ) -> DomRoot<PerformanceTiming> {
+        reflect_dom_object(
+            Box::new(PerformanceTiming {
+                reflector_: Reflector::new(),
+                navigation_start: Cell::new(navigation_start),
+                unload_event_start: Cell::new(0),
+                unload_event_end: Cell::new(0),
+                redirect_start: Cell::new(0),
+                redirect_end: Cell::new(0),
+                fetch_start: Cell::new(0),
+                domain_lookup_start: Cell::new(0),
+                domain_lookup_end: Cell::new(0),
+                connect_start: Cell::new(0),
+                connect_end: Cell::new(0),
+                secure_connection_start: Cell::new(0),
+                request_start: Cell::new(0),
+                response_start: Cell::new(0),
+                response_end: Cell::new(0),
+                dom_loading: Cell::new(0),
+                dom_interactive: Cell::new(0),
+                dom_content_loaded_event_start: Cell::new(0),
+                dom_content_loaded_event_end: Cell::new(0),
+                dom_complete: Cell::new(0),
+                load_event_start: Cell::new(0),
+                load_event_end: Cell::new(0),
+            }),
+            global,
+            can_gc,
+        )
+    }
+
+    pub(crate) fn update_unload_event_start(&self, value: u64) {
+        self.unload_event_start.set(value);
+    }
+
+    pub(crate) fn update_unload_event_end(&self, value: u64) {
+        self.unload_event_end.set(value);
+    }
+
+    pub(crate) fn update_redirect_start(&self, value: u64) {
+        self.redirect_start.set(value);
+    }
+
+    pub(crate) fn update_redirect_end(&self, value: u64) {
+        self.redirect_end.set(value);
+    }
+
+    pub(crate) fn update_fetch_start(&self, value: u64) {
+        self.fetch_start.set(value);
+    }
+
+    pub(crate) fn update_domain_lookup_start(&self, value: u64) {
+        self.domain_lookup_start.set(value);
+    }
+
+    pub(crate) fn update_domain_lookup_end(&self, value: u64) {
+        self.domain_lookup_end.set(value);
+    }
+
+    pub(crate) fn update_connect_start(&self, value: u64) {
+        self.connect_start.set(value);
+    }
+
+    pub(crate) fn update_connect_end(&self, value: u64) {
+        self.connect_end.set(value);
+    }
+    pub(crate) fn update_secure_connection_start(&self, value: u64) {
+        self.secure_connection_start.set(value);
+    }
+    pub(crate) fn update_request_start(&self, value: u64) {
+        self.request_start.set(value);
+    }
+    pub(crate) fn update_response_start(&self, value: u64) {
+        self.response_start.set(value);
+    }
+    pub(crate) fn update_response_end(&self, value: u64) {
+        self.response_end.set(value);
+    }
+    pub(crate) fn update_dom_loading(&self, value: u64) {
+        self.dom_loading.set(value);
+    }
+    pub(crate) fn update_dom_interactive(&self, value: u64) {
+        self.dom_interactive.set(value);
+    }
+    pub(crate) fn update_dom_content_loaded_event_start(&self, value: u64) {
+        self.dom_content_loaded_event_start.set(value);
+    }
+    pub(crate) fn update_dom_content_loaded_event_end(&self, value: u64) {
+        self.dom_content_loaded_event_end.set(value);
+    }
+    pub(crate) fn update_dom_complete(&self, value: u64) {
+        self.dom_complete.set(value);
+    }
+    pub(crate) fn update_load_event_start(&self, value: u64) {
+        self.load_event_start.set(value);
+    }
+    pub(crate) fn update_load_event_end(&self, value: u64) {
+        self.load_event_end.set(value);
+    }
+}
+
+impl PerformanceTimingMethods<crate::DomTypeHolder> for PerformanceTiming {
+    // https://w3c.github.io/navigation-timing/#dom-performancetiming-navigationstart
+    fn NavigationStart(&self) -> u64 {
+        self.navigation_start.get()
+    }
+
+    // https://w3c.github.io/navigation-timing/#dom-performancetiming-unloadeventstart
+    fn UnloadEventStart(&self) -> u64 {
+        self.unload_event_start.get()
+    }
+
+    // https://w3c.github.io/navigation-timing/#dom-performancetiming-unloadeventend
+    fn UnloadEventEnd(&self) -> u64 {
+        self.unload_event_end.get()
+    }
+
+    // https://w3c.github.io/navigation-timing/#dom-performancetiming-redirectstart
+    fn RedirectStart(&self) -> u64 {
+        self.redirect_start.get()
+    }
+
+    // https://w3c.github.io/navigation-timing/#dom-performancetiming-redirectend
+    fn RedirectEnd(&self) -> u64 {
+        self.redirect_end.get()
+    }
+
+    // https://w3c.github.io/navigation-timing/#dom-performancetiming-fetchstart
+    fn FetchStart(&self) -> u64 {
+        self.fetch_start.get()
+    }
+
+    // https://w3c.github.io/navigation-timing/#dom-performancetiming-domainlookupstart
+    fn DomainLookupStart(&self) -> u64 {
+        self.domain_lookup_start.get()
+    }
+
+    // https://w3c.github.io/navigation-timing/#dom-performancetiming-domainlookupend
+    fn DomainLookupEnd(&self) -> u64 {
+        self.domain_lookup_end.get()
+    }
+
+    // https://w3c.github.io/navigation-timing/#dom-performancetiming-connectstart
+    fn ConnectStart(&self) -> u64 {
+        self.connect_start.get()
+    }
+
+    // https://w3c.github.io/navigation-timing/#dom-performancetiming-connectend
+    fn ConnectEnd(&self) -> u64 {
+        self.connect_end.get()
+    }
+
+    // https://w3c.github.io/navigation-timing#dom-performancetiming-secureconnectionstart
+    fn SecureConnectionStart(&self) -> u64 {
+        self.secure_connection_start.get()
+    }
+
+    // https://w3c.github.io/navigation-timing/#dom-performancetiming-requeststart
+    fn RequestStart(&self) -> u64 {
+        self.request_start.get()
+    }
+
+    // https://w3c.github.io/navigation-timing/#dom-performancetiming-responsestart
+    fn ResponseStart(&self) -> u64 {
+        self.response_start.get()
+    }
+
+    // https://w3c.github.io/navigation-timing/#dom-performancetiming-responseend
+    fn ResponseEnd(&self) -> u64 {
+        self.response_end.get()
+    }
+
+    // https://w3c.github.io/navigation-timing/#dom-performancetiming-domloading
+    fn DomLoading(&self) -> u64 {
+        self.dom_loading.get()
+    }
+
+    // https://w3c.github.io/navigation-timing/#dom-performancetiming-dominteractive
+    fn DomInteractive(&self) -> u64 {
+        self.dom_interactive.get()
+    }
+
+    // https://w3c.github.io/navigation-timing/#dom-performancetiming-domcontentloadedeventstart
+    fn DomContentLoadedEventStart(&self) -> u64 {
+        self.dom_content_loaded_event_start.get()
+    }
+
+    // https://w3c.github.io/navigation-timing/#dom-performancetiming-domcontentloadedeventend
+    fn DomContentLoadedEventEnd(&self) -> u64 {
+        self.dom_content_loaded_event_end.get()
+    }
+
+    // https://w3c.github.io/navigation-timing/#dom-performancetiming-domcomplete
+    fn DomComplete(&self) -> u64 {
+        self.dom_complete.get()
+    }
+
+    // https://w3c.github.io/navigation-timing/#dom-performancetiming-loadeventstart
+    fn LoadEventStart(&self) -> u64 {
+        self.load_event_start.get()
+    }
+
+    // https://w3c.github.io/navigation-timing/#dom-performancetiming-loadeventend
+    fn LoadEventEnd(&self) -> u64 {
+        self.load_event_end.get()
+    }
+}
diff --git a/components/script/dom/windowproxy.rs b/components/script/dom/windowproxy.rs
index a8decee24ed..9c047b238c1 100644
--- a/components/script/dom/windowproxy.rs
+++ b/components/script/dom/windowproxy.rs
@@ -185,7 +185,6 @@ impl WindowProxy {
             assert!(!js_proxy.is_null());
 
             // Create a new browsing context.
-
             let current = Some(window.upcast::<GlobalScope>().pipeline_id());
             let window_proxy = Box::new(WindowProxy::new_inherited(
                 browsing_context_id,
diff --git a/components/script_bindings/webidls/Performance.webidl b/components/script_bindings/webidls/Performance.webidl
index 46f751cb4ab..98574ac0078 100644
--- a/components/script_bindings/webidls/Performance.webidl
+++ b/components/script_bindings/webidls/Performance.webidl
@@ -47,7 +47,7 @@ partial interface Performance {
 [Exposed=Window]
 partial interface Performance {
   [SameObject]
-  readonly attribute PerformanceNavigationTiming timing;
+  readonly attribute PerformanceTiming timing;
   [SameObject]
   readonly attribute PerformanceNavigation navigation;
 };
diff --git a/components/script_bindings/webidls/PerformanceTiming.webidl b/components/script_bindings/webidls/PerformanceTiming.webidl
new file mode 100644
index 00000000000..bc9fb0134b1
--- /dev/null
+++ b/components/script_bindings/webidls/PerformanceTiming.webidl
@@ -0,0 +1,30 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
+
+ // https://w3c.github.io/navigation-timing/#the-performancetiming-interface
+
+[Exposed=Window]
+interface PerformanceTiming {
+    readonly attribute unsigned long long navigationStart;
+    readonly attribute unsigned long long unloadEventStart;
+    readonly attribute unsigned long long unloadEventEnd;
+    readonly attribute unsigned long long redirectStart;
+    readonly attribute unsigned long long redirectEnd;
+    readonly attribute unsigned long long fetchStart;
+    readonly attribute unsigned long long domainLookupStart;
+    readonly attribute unsigned long long domainLookupEnd;
+    readonly attribute unsigned long long connectStart;
+    readonly attribute unsigned long long connectEnd;
+    readonly attribute unsigned long long secureConnectionStart;
+    readonly attribute unsigned long long requestStart;
+    readonly attribute unsigned long long responseStart;
+    readonly attribute unsigned long long responseEnd;
+    readonly attribute unsigned long long domLoading;
+    readonly attribute unsigned long long domInteractive;
+    readonly attribute unsigned long long domContentLoadedEventStart;
+    readonly attribute unsigned long long domContentLoadedEventEnd;
+    readonly attribute unsigned long long domComplete;
+    readonly attribute unsigned long long loadEventStart;
+    readonly attribute unsigned long long loadEventEnd;
+};