script: Start replacing `time` with `std::time` and `chrono` (#30639)

* Replace `time` with `chrono` in `script/animation_timeline`

Signed-off-by: Auguste Baum <auguste.apple@gmail.com>

* Replace `time` with `std::time` in `script/script_thread.rs`

Signed-off-by: Auguste Baum <auguste.apple@gmail.com>

* Replace `time` with `std::time` and `chrono` in `script/script_thread.rs`

Signed-off-by: Auguste Baum <auguste.apple@gmail.com>

* Replace `time` with `std::time` in `script/script_runtime.rs`

Signed-off-by: Auguste Baum <auguste.apple@gmail.com>

* Replace `time` with `std::time` in `script/script_runtime.rs`

Signed-off-by: Auguste Baum <auguste.apple@gmail.com>

* Replace `time` with `std::time` in `script/dom/workerglobalscope.rs`

Signed-off-by: Auguste Baum <auguste.apple@gmail.com>

* Replace `time` with `chrono` in `script/dom/workerglobalscope.rs`

Signed-off-by: Auguste Baum <auguste.apple@gmail.com>

* Replace `time` with `std::time` in `script/dom/htmlmedialelement.rs`

Signed-off-by: Auguste Baum <auguste.apple@gmail.com>

* Replace `time` with `std::time` in `script/dom/htmlmedialelement.rs`

Signed-off-by: Auguste Baum <auguste.apple@gmail.com>

* Replace `time` with `std::time` in `script/dom/globalscope.rs`

Signed-off-by: Auguste Baum <auguste.apple@gmail.com>

* Replace `time` with `chrono` in `script/dom/globalscope.rs`

Signed-off-by: Auguste Baum <auguste.apple@gmail.com>

* Replace `time` with `std::time` in `script/dom/htmlformelement.rs`

Signed-off-by: Auguste Baum <auguste.apple@gmail.com>

* Replace `time` with `std::time` in `script/dom/htmlformelement.rs`

Signed-off-by: Auguste Baum <auguste.apple@gmail.com>

* Increase precision of animation timeline

* Some fixes

Use Instant a bit more and stop using chrono. Do not transition
`navigation_start_precise` to Instant yet as we need to coordinate this
across all crates.

---------

Signed-off-by: Auguste Baum <auguste.apple@gmail.com>
Co-authored-by: Martin Robinson <mrobinson@igalia.com>

7 files changed, 62 insertions, 61 deletions

diff --git a/components/malloc_size_of/lib.rs b/components/malloc_size_of/lib.rs
index 32bcfd9145f..ed68e72832d 100644
--- a/components/malloc_size_of/lib.rs
+++ b/components/malloc_size_of/lib.rs
@@ -896,6 +896,8 @@ malloc_size_of_is_0!(time::Tm);
 malloc_size_of_is_0!(std::time::Duration);
 #[cfg(feature = "servo")]
 malloc_size_of_is_0!(std::time::SystemTime);
+#[cfg(feature = "servo")]
+malloc_size_of_is_0!(std::time::Instant);
 
 #[cfg(feature = "servo")]
 impl<T> MallocSizeOf for hyper_serde::Serde<T>
diff --git a/components/script/animation_timeline.rs b/components/script/animation_timeline.rs
index ea2a88af380..6cae2640cfa 100644
--- a/components/script/animation_timeline.rs
+++ b/components/script/animation_timeline.rs
@@ -7,8 +7,9 @@
 //! A timeline module, used to specify an `AnimationTimeline` which determines
 //! the time used for synchronizing animations in the script thread.
 
+use std::time::{SystemTime, UNIX_EPOCH};
+
 use jstraceable_derive::JSTraceable;
-use time;
 
 /// A `AnimationTimeline` which is used to synchronize animations during the script
 /// event loop.
@@ -22,7 +23,10 @@ impl AnimationTimeline {
     #[inline]
     pub fn new() -> Self {
         Self {
-            current_value: time::precise_time_s(),
+            current_value: SystemTime::now()
+                .duration_since(UNIX_EPOCH)
+                .unwrap_or_default()
+                .as_secs_f64(),
         }
     }
 
@@ -39,7 +43,10 @@ impl AnimationTimeline {
 
     /// Updates the value of the `AnimationTimeline` to the current clock time.
     pub fn update(&mut self) {
-        self.current_value = time::precise_time_s();
+        self.current_value = SystemTime::now()
+            .duration_since(UNIX_EPOCH)
+            .unwrap_or_default()
+            .as_secs_f64();
     }
 
     /// Increments the current value of the timeline by a specific number of seconds.
diff --git a/components/script/dom/globalscope.rs b/components/script/dom/globalscope.rs
index 6a1467d7076..c78d24c7e8f 100644
--- a/components/script/dom/globalscope.rs
+++ b/components/script/dom/globalscope.rs
@@ -11,6 +11,7 @@ use std::rc::Rc;
 use std::sync::atomic::{AtomicBool, Ordering};
 use std::sync::Arc;
 use std::thread::JoinHandle;
+use std::time::Instant;
 use std::{mem, ptr};
 
 use content_security_policy::CspList;
@@ -54,7 +55,6 @@ use script_traits::{
     ScriptToConstellationChan, TimerEvent, TimerEventId, TimerSchedulerMsg, TimerSource,
 };
 use servo_url::{ImmutableOrigin, MutableOrigin, ServoUrl};
-use time::{get_time, Timespec};
 use uuid::Uuid;
 use webgpu::identity::WebGPUOpResult;
 use webgpu::{ErrorScopeId, WebGPUDevice};
@@ -203,8 +203,8 @@ pub struct GlobalScope {
     /// live updates from the worker.
     devtools_wants_updates: Cell<bool>,
 
-    /// Timers used by the Console API.
-    console_timers: DomRefCell<HashMap<DOMString, u64>>,
+    /// Timers (milliseconds) used by the Console API.
+    console_timers: DomRefCell<HashMap<DOMString, Instant>>,
 
     /// module map is used when importing JavaScript modules
     /// https://html.spec.whatwg.org/multipage/#concept-settings-object-module-map
@@ -2262,7 +2262,7 @@ impl GlobalScope {
         }
         match timers.entry(label) {
             Entry::Vacant(entry) => {
-                entry.insert(timestamp_in_ms(get_time()));
+                entry.insert(Instant::now());
                 Ok(())
             },
             Entry::Occupied(_) => Err(()),
@@ -2274,7 +2274,7 @@ impl GlobalScope {
             .borrow_mut()
             .remove(label)
             .ok_or(())
-            .map(|start| timestamp_in_ms(get_time()) - start)
+            .map(|start| (Instant::now() - start).as_millis() as u64)
     }
 
     /// Get an `&IpcSender<ScriptToDevtoolsControlMsg>` to send messages
@@ -3111,10 +3111,6 @@ impl GlobalScope {
     }
 }
 
-fn timestamp_in_ms(time: Timespec) -> u64 {
-    (time.sec * 1000 + (time.nsec / 1000000) as i64) as u64
-}
-
 /// Returns the Rust global scope from a JS global object.
 #[allow(unsafe_code)]
 unsafe fn global_scope_from_global(
diff --git a/components/script/dom/htmlformelement.rs b/components/script/dom/htmlformelement.rs
index bbd12d4d491..06a97771a38 100644
--- a/components/script/dom/htmlformelement.rs
+++ b/components/script/dom/htmlformelement.rs
@@ -4,6 +4,7 @@
 
 use std::borrow::ToOwned;
 use std::cell::Cell;
+use std::time::{Duration, Instant};
 
 use dom_struct::dom_struct;
 use encoding_rs::{Encoding, UTF_8};
@@ -20,7 +21,6 @@ use servo_rand::random;
 use style::attr::AttrValue;
 use style::str::split_html_space_chars;
 use style_traits::dom::ElementState;
-use time::{now, Duration, Tm};
 
 use super::bindings::trace::{HashMapTracedValues, NoTrace};
 use crate::body::Extractable;
@@ -94,7 +94,7 @@ pub struct HTMLFormElement {
     elements: DomOnceCell<HTMLFormControlsCollection>,
     generation_id: Cell<GenerationId>,
     controls: DomRefCell<Vec<Dom<Element>>>,
-    past_names_map: DomRefCell<HashMapTracedValues<Atom, (Dom<Element>, NoTrace<Tm>)>>,
+    past_names_map: DomRefCell<HashMapTracedValues<Atom, (Dom<Element>, NoTrace<Instant>)>>,
     firing_submission_events: Cell<bool>,
     rel_list: MutNullableDom<DOMTokenList>,
 }
@@ -442,7 +442,7 @@ impl HTMLFormElementMethods for HTMLFormElement {
             name,
             (
                 Dom::from_ref(&*element_node.downcast::<Element>().unwrap()),
-                NoTrace(now()),
+                NoTrace(Instant::now()),
             ),
         );
 
@@ -556,7 +556,7 @@ impl HTMLFormElementMethods for HTMLFormElement {
             let entry = SourcedName {
                 name: key.clone(),
                 element: DomRoot::from_ref(&*val.0),
-                source: SourcedNameSource::Past(now() - val.1 .0), // calculate difference now()-val.1 to find age
+                source: SourcedNameSource::Past(Instant::now().duration_since(val.1 .0)),
             };
             sourced_names_vec.push(entry);
         }
diff --git a/components/script/dom/htmlmediaelement.rs b/components/script/dom/htmlmediaelement.rs
index 824aadd1ee2..2d89abaa7b7 100644
--- a/components/script/dom/htmlmediaelement.rs
+++ b/components/script/dom/htmlmediaelement.rs
@@ -6,6 +6,7 @@ use std::cell::Cell;
 use std::collections::VecDeque;
 use std::rc::Rc;
 use std::sync::{Arc, Mutex};
+use std::time::{Duration, Instant};
 use std::{f64, mem};
 
 use dom_struct::dom_struct;
@@ -33,7 +34,6 @@ use servo_media::player::video::{VideoFrame, VideoFrameRenderer};
 use servo_media::player::{PlaybackState, Player, PlayerError, PlayerEvent, SeekLock, StreamType};
 use servo_media::{ClientContextId, ServoMedia, SupportsMediaType};
 use servo_url::ServoUrl;
-use time::{self, Duration, Timespec};
 use webrender_api::{
     ExternalImageData, ExternalImageId, ExternalImageType, ImageBufferKind, ImageData,
     ImageDescriptor, ImageDescriptorFlags, ImageFormat, ImageKey,
@@ -377,9 +377,8 @@ pub struct HTMLMediaElement {
     /// https://html.spec.whatwg.org/multipage/#dom-media-texttracks
     text_tracks_list: MutNullableDom<TextTrackList>,
     /// Time of last timeupdate notification.
-    #[ignore_malloc_size_of = "Defined in time"]
-    #[no_trace]
-    next_timeupdate_event: Cell<Timespec>,
+    #[ignore_malloc_size_of = "Defined in std::time"]
+    next_timeupdate_event: Cell<Instant>,
     /// Latest fetch request context.
     current_fetch_context: DomRefCell<Option<HTMLMediaElementFetchContext>>,
     /// Player Id reported the player thread
@@ -452,7 +451,7 @@ impl HTMLMediaElement {
             audio_tracks_list: Default::default(),
             video_tracks_list: Default::default(),
             text_tracks_list: Default::default(),
-            next_timeupdate_event: Cell::new(time::get_time() + Duration::milliseconds(250)),
+            next_timeupdate_event: Cell::new(Instant::now() + Duration::from_millis(250)),
             current_fetch_context: DomRefCell::new(None),
             id: Cell::new(0),
             media_controls_id: DomRefCell::new(None),
@@ -502,14 +501,14 @@ impl HTMLMediaElement {
     /// https://html.spec.whatwg.org/multipage/#time-marches-on
     fn time_marches_on(&self) {
         // Step 6.
-        if time::get_time() > self.next_timeupdate_event.get() {
+        if Instant::now() > self.next_timeupdate_event.get() {
             let window = window_from_node(self);
             window
                 .task_manager()
                 .media_element_task_source()
                 .queue_simple_event(self.upcast(), atom!("timeupdate"), &window);
             self.next_timeupdate_event
-                .set(time::get_time() + Duration::milliseconds(350));
+                .set(Instant::now() + Duration::from_millis(350));
         }
     }
 
@@ -2602,7 +2601,7 @@ struct HTMLMediaElementFetchListener {
     /// The generation of the media element when this fetch started.
     generation_id: u32,
     /// Time of last progress notification.
-    next_progress_event: Timespec,
+    next_progress_event: Instant,
     /// Timing data for this resource.
     resource_timing: ResourceFetchTiming,
     /// Url for the resource.
@@ -2751,13 +2750,13 @@ impl FetchResponseListener for HTMLMediaElementFetchListener {
 
         // https://html.spec.whatwg.org/multipage/#concept-media-load-resource step 4,
         // => "If mode is remote" step 2
-        if time::get_time() > self.next_progress_event {
+        if Instant::now() > self.next_progress_event {
             let window = window_from_node(&*elem);
             window
                 .task_manager()
                 .media_element_task_source()
                 .queue_simple_event(elem.upcast(), atom!("progress"), &window);
-            self.next_progress_event = time::get_time() + Duration::milliseconds(350);
+            self.next_progress_event = Instant::now() + Duration::from_millis(350);
         }
     }
 
@@ -2886,7 +2885,7 @@ impl HTMLMediaElementFetchListener {
             elem: Trusted::new(elem),
             metadata: None,
             generation_id: elem.generation_id.get(),
-            next_progress_event: time::get_time() + Duration::milliseconds(350),
+            next_progress_event: Instant::now() + Duration::from_millis(350),
             resource_timing: ResourceFetchTiming::new(ResourceTimingType::Resource),
             url,
             expected_content_length: None,
diff --git a/components/script/script_runtime.rs b/components/script/script_runtime.rs
index 45e8b9aa716..6d0894fa3fb 100644
--- a/components/script/script_runtime.rs
+++ b/components/script/script_runtime.rs
@@ -15,7 +15,7 @@ use std::ops::Deref;
 use std::os::raw::c_void;
 use std::rc::Rc;
 use std::sync::{Arc, Mutex};
-use std::time::Duration;
+use std::time::{Duration, Instant};
 use std::{fmt, os, ptr, thread};
 
 use js::glue::{
@@ -50,7 +50,6 @@ use profile_traits::mem::{Report, ReportKind, ReportsChan};
 use profile_traits::path;
 use servo_config::{opts, pref};
 use style::thread_state::{self, ThreadState};
-use time::{now, Tm};
 
 use crate::body::BodyMixin;
 use crate::dom::bindings::codegen::Bindings::PromiseBinding::PromiseJobCallback;
@@ -750,8 +749,8 @@ pub fn get_reports(cx: *mut RawJSContext, path_seg: String) -> Vec<Report> {
     reports
 }
 
-thread_local!(static GC_CYCLE_START: Cell<Option<Tm>> = Cell::new(None));
-thread_local!(static GC_SLICE_START: Cell<Option<Tm>> = Cell::new(None));
+thread_local!(static GC_CYCLE_START: Cell<Option<Instant>> = Cell::new(None));
+thread_local!(static GC_SLICE_START: Cell<Option<Instant>> = Cell::new(None));
 
 #[allow(unsafe_code)]
 unsafe extern "C" fn gc_slice_callback(
@@ -761,22 +760,22 @@ unsafe extern "C" fn gc_slice_callback(
 ) {
     match progress {
         GCProgress::GC_CYCLE_BEGIN => GC_CYCLE_START.with(|start| {
-            start.set(Some(now()));
+            start.set(Some(Instant::now()));
             println!("GC cycle began");
         }),
         GCProgress::GC_SLICE_BEGIN => GC_SLICE_START.with(|start| {
-            start.set(Some(now()));
+            start.set(Some(Instant::now()));
             println!("GC slice began");
         }),
         GCProgress::GC_SLICE_END => GC_SLICE_START.with(|start| {
-            let dur = now() - start.get().unwrap();
+            let duration = start.get().unwrap().elapsed();
             start.set(None);
-            println!("GC slice ended: duration={}", dur);
+            println!("GC slice ended: duration={:?}", duration);
         }),
         GCProgress::GC_CYCLE_END => GC_CYCLE_START.with(|start| {
-            let dur = now() - start.get().unwrap();
+            let duration = start.get().unwrap().elapsed();
             start.set(None);
-            println!("GC cycle ended: duration={}", dur);
+            println!("GC cycle ended: duration={:?}", duration);
         }),
     };
     if !desc.is_null() {
diff --git a/components/script/script_thread.rs b/components/script/script_thread.rs
index 25f47f3a440..5f87aaac47b 100644
--- a/components/script/script_thread.rs
+++ b/components/script/script_thread.rs
@@ -27,11 +27,12 @@ use std::rc::Rc;
 use std::result::Result;
 use std::sync::atomic::{AtomicBool, Ordering};
 use std::sync::Arc;
-use std::time::{Duration, SystemTime};
+use std::time::{Duration, Instant, SystemTime, UNIX_EPOCH};
 use std::{ptr, thread};
 
 use bluetooth_traits::BluetoothRequest;
 use canvas_traits::webgl::WebGLPipeline;
+use chrono::{DateTime, Local};
 use crossbeam_channel::{select, unbounded, Receiver, Sender};
 use devtools_traits::{
     CSSError, DevtoolScriptControlMsg, DevtoolsPageInfo, NavigationState,
@@ -91,7 +92,7 @@ use servo_config::opts;
 use servo_url::{ImmutableOrigin, MutableOrigin, ServoUrl};
 use style::dom::OpaqueNode;
 use style::thread_state::{self, ThreadState};
-use time::{at_utc, get_time, precise_time_ns, Timespec};
+use time::precise_time_ns;
 use url::Position;
 use webgpu::identity::WebGPUMsg;
 use webrender_api::units::LayoutPixel;
@@ -214,9 +215,9 @@ struct InProgressLoad {
     /// The origin for the document
     #[no_trace]
     origin: MutableOrigin,
-    /// Timestamp reporting the time when the browser started this load.
+    /// Timestamp reporting the time in milliseconds when the browser started this load.
     navigation_start: u64,
-    /// High res timestamp reporting the time when the browser started this load.
+    /// High res timestamp reporting the time in nanoseconds when the browser started this load.
     navigation_start_precise: u64,
     /// For cancelling the fetch
     canceller: FetchCanceller,
@@ -241,10 +242,15 @@ impl InProgressLoad {
         layout_is_busy: Arc<AtomicBool>,
         inherited_secure_context: Option<bool>,
     ) -> InProgressLoad {
-        let current_time = get_time();
+        let duration = SystemTime::now()
+            .duration_since(UNIX_EPOCH)
+            .unwrap_or_default();
+        let navigation_start = duration.as_millis();
         let navigation_start_precise = precise_time_ns();
         layout_chan
-            .send(message::Msg::SetNavigationStart(navigation_start_precise))
+            .send(message::Msg::SetNavigationStart(
+                navigation_start_precise as u64,
+            ))
             .unwrap();
         InProgressLoad {
             pipeline_id: id,
@@ -258,7 +264,7 @@ impl InProgressLoad {
             is_visible: true,
             url: url,
             origin: origin,
-            navigation_start: (current_time.sec * 1000 + current_time.nsec as i64 / 1000000) as u64,
+            navigation_start: navigation_start as u64,
             navigation_start_precise: navigation_start_precise,
             canceller: Default::default(),
             layout_is_busy: layout_is_busy,
@@ -1864,7 +1870,7 @@ impl ScriptThread {
         F: FnOnce() -> R,
     {
         self.notify_activity_to_hang_monitor(&category);
-        let start = precise_time_ns();
+        let start = Instant::now();
         let value = if self.profile_script_events {
             let profiler_cat = match category {
                 ScriptThreadEventCategory::AttachLayout => ProfilerCategory::ScriptAttachLayout,
@@ -1911,15 +1917,15 @@ impl ScriptThread {
         } else {
             f()
         };
-        let end = precise_time_ns();
+        let task_duration = start.elapsed();
         for (doc_id, doc) in self.documents.borrow().iter() {
             if let Some(pipeline_id) = pipeline_id {
-                if pipeline_id == doc_id && end - start > MAX_TASK_NS {
+                if pipeline_id == doc_id && task_duration.as_nanos() > MAX_TASK_NS.into() {
                     if self.print_pwm {
                         println!(
                             "Task took longer than max allowed ({:?}) {:?}",
                             category,
-                            end - start
+                            task_duration.as_nanos()
                         );
                     }
                     doc.start_tti();
@@ -3351,9 +3357,11 @@ impl ScriptThread {
         window.init_window_proxy(&window_proxy);
 
         let last_modified = metadata.headers.as_ref().and_then(|headers| {
-            headers
-                .typed_get::<LastModified>()
-                .map(|tm| dom_last_modified(&tm.into()))
+            headers.typed_get::<LastModified>().map(|tm| {
+                let tm: SystemTime = tm.into();
+                let local_time: DateTime<Local> = tm.into();
+                local_time.format("%m/%d/%Y %H:%M:%S").to_string()
+            })
         });
 
         let loader = DocumentLoader::new_with_threads(
@@ -4057,13 +4065,3 @@ impl Drop for ScriptThread {
         });
     }
 }
-
-fn dom_last_modified(tm: &SystemTime) -> String {
-    let tm = tm.duration_since(SystemTime::UNIX_EPOCH).unwrap();
-    let tm = Timespec::new(tm.as_secs() as i64, 0);
-    let tm = at_utc(tm);
-    tm.to_local()
-        .strftime("%m/%d/%Y %H:%M:%S")
-        .unwrap()
-        .to_string()
-}