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Implement basic Time To First Paint and First Contentful Paint PWMs

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This commit is contained in:
Fernando Jiménez Moreno 2017-05-26 19:13:39 +02:00
parent 20a3b0236d
commit 892b30edca
20 changed files with 213 additions and 10 deletions
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36
components/layout_thread/lib.rs
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@ -27,6 +27,7 @@ extern crate layout_traits;
extern crate lazy_static;
#[macro_use]
extern crate log;
extern crate metrics;
extern crate msg;
extern crate net_traits;
extern crate parking_lot;
@ -83,6 +84,7 @@ use layout::traversal::{ComputeAbsolutePositions, RecalcStyleAndConstructFlows};
use layout::webrender_helpers::WebRenderDisplayListConverter;
use layout::wrapper::LayoutNodeLayoutData;
use layout_traits::LayoutThreadFactory;
use metrics::{PaintTimeMetrics, ProfilerMetadataFactory};
use msg::constellation_msg::PipelineId;
use msg::constellation_msg::TopLevelBrowsingContextId;
use net_traits::image_cache::{ImageCache, UsePlaceholder};
@ -248,7 +250,10 @@ pub struct LayoutThread {
layout_threads: usize,
/// Which quirks mode are we rendering the document in?
quirks_mode: Option<QuirksMode>
quirks_mode: Option<QuirksMode>,
/// Paint time metrics.
paint_time_metrics: PaintTimeMetrics,
}
impl LayoutThreadFactory for LayoutThread {
@ -269,7 +274,8 @@ impl LayoutThreadFactory for LayoutThread {
mem_profiler_chan: mem::ProfilerChan,
content_process_shutdown_chan: Option<IpcSender<()>>,
webrender_api_sender: webrender_api::RenderApiSender,
layout_threads: usize) {
layout_threads: usize,
paint_time_metrics: PaintTimeMetrics) {
thread::Builder::new().name(format!("LayoutThread {:?}", id)).spawn(move || {
thread_state::initialize(thread_state::LAYOUT);
@ -291,7 +297,8 @@ impl LayoutThreadFactory for LayoutThread {
time_profiler_chan,
mem_profiler_chan.clone(),
webrender_api_sender,
layout_threads);
layout_threads,
paint_time_metrics);
let reporter_name = format!("layout-reporter-{}", id);
mem_profiler_chan.run_with_memory_reporting(|| {
@ -452,7 +459,8 @@ impl LayoutThread {
time_profiler_chan: time::ProfilerChan,
mem_profiler_chan: mem::ProfilerChan,
webrender_api_sender: webrender_api::RenderApiSender,
layout_threads: usize)
layout_threads: usize,
paint_time_metrics: PaintTimeMetrics)
-> LayoutThread {
let device = Device::new(
MediaType::Screen,
@ -551,6 +559,7 @@ impl LayoutThread {
},
layout_threads: layout_threads,
quirks_mode: None,
paint_time_metrics: paint_time_metrics,
}
}
@ -733,7 +742,10 @@ impl LayoutThread {
debug!("layout: ExitNow received");
self.exit_now();
return false
}
},
Msg::SetNavigationStart(time) => {
self.paint_time_metrics.set_navigation_start(time);
},
}
true
@ -785,7 +797,8 @@ impl LayoutThread {
self.mem_profiler_chan.clone(),
info.content_process_shutdown_chan,
self.webrender_api.clone_sender(),
info.layout_threads);
info.layout_threads,
info.paint_time_metrics);
}
/// Enters a quiescent state in which no new messages will be processed until an `ExitNow` is
@ -1020,6 +1033,12 @@ impl LayoutThread {
self.epoch.set(epoch);
let viewport_size = webrender_api::LayoutSize::from_untyped(&viewport_size);
// Set paint metrics if needed right before sending the display list to WebRender.
// XXX At some point, we may want to set this metric from WebRender itself.
self.paint_time_metrics.maybe_set_first_paint(self);
self.paint_time_metrics.maybe_set_first_contentful_paint(self, &display_list);
self.webrender_api.set_display_list(
Some(get_root_flow_background_color(layout_root)),
webrender_api::Epoch(epoch.0),
@ -1655,6 +1674,11 @@ impl LayoutThread {
}
}
impl ProfilerMetadataFactory for LayoutThread {
fn new_metadata(&self) -> Option<TimerMetadata> {
self.profiler_metadata()
}
}
// The default computed value for background-color is transparent (see
// http://dev.w3.org/csswg/css-backgrounds/#background-color). However, we