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Auto merge of #16379 - bholley:quieter_stats, r=SimonSapin
Limit traversal statistics dumps to subtrees of 50 or more elements and add more values. On Gecko, we get tons of console spam from 1-element traversals if we don't do this. <!-- Reviewable:start --> --- This change is [<img src="https://reviewable.io/review_button.svg" height="34" align="absmiddle" alt="Reviewable"/>](https://reviewable.io/reviews/servo/servo/16379) <!-- Reviewable:end -->
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commit
b514168469
5 changed files with 95 additions and 15 deletions
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@ -171,6 +171,16 @@ pub struct TraversalStatistics {
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pub elements_matched: u32,
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/// The number of cache hits from the StyleSharingCache.
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pub styles_shared: u32,
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/// The number of selectors in the stylist.
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pub selectors: u32,
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/// The number of revalidation selectors.
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pub revalidation_selectors: u32,
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/// The number of state/attr dependencies in the dependency set.
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pub dependency_selectors: u32,
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/// The number of declarations in the stylist.
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pub declarations: u32,
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/// The number of times the stylist was rebuilt.
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pub stylist_rebuilds: u32,
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/// Time spent in the traversal, in milliseconds.
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pub traversal_time_ms: f64,
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/// Whether this was a parallel traversal.
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@ -183,11 +193,21 @@ impl<'a> Add for &'a TraversalStatistics {
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fn add(self, other: Self) -> TraversalStatistics {
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debug_assert!(self.traversal_time_ms == 0.0 && other.traversal_time_ms == 0.0,
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"traversal_time_ms should be set at the end by the caller");
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debug_assert!(self.selectors == 0, "set at the end");
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debug_assert!(self.revalidation_selectors == 0, "set at the end");
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debug_assert!(self.dependency_selectors == 0, "set at the end");
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debug_assert!(self.declarations == 0, "set at the end");
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debug_assert!(self.stylist_rebuilds == 0, "set at the end");
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TraversalStatistics {
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elements_traversed: self.elements_traversed + other.elements_traversed,
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elements_styled: self.elements_styled + other.elements_styled,
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elements_matched: self.elements_matched + other.elements_matched,
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styles_shared: self.styles_shared + other.styles_shared,
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selectors: 0,
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revalidation_selectors: 0,
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dependency_selectors: 0,
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declarations: 0,
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stylist_rebuilds: 0,
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traversal_time_ms: 0.0,
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is_parallel: None,
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}
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@ -209,6 +229,11 @@ impl fmt::Display for TraversalStatistics {
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try!(writeln!(f, "[PERF],elements_styled,{}", self.elements_styled));
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try!(writeln!(f, "[PERF],elements_matched,{}", self.elements_matched));
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try!(writeln!(f, "[PERF],styles_shared,{}", self.styles_shared));
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try!(writeln!(f, "[PERF],selectors,{}", self.selectors));
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try!(writeln!(f, "[PERF],revalidation_selectors,{}", self.revalidation_selectors));
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try!(writeln!(f, "[PERF],dependency_selectors,{}", self.dependency_selectors));
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try!(writeln!(f, "[PERF],declarations,{}", self.declarations));
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try!(writeln!(f, "[PERF],stylist_rebuilds,{}", self.stylist_rebuilds));
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try!(writeln!(f, "[PERF],traversal_time_ms,{}", self.traversal_time_ms));
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writeln!(f, "[PERF] perf block end")
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}
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@ -222,6 +247,17 @@ impl TraversalStatistics {
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{
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self.is_parallel = Some(traversal.is_parallel());
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self.traversal_time_ms = (time::precise_time_s() - start) * 1000.0;
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self.selectors = traversal.shared_context().stylist.num_selectors() as u32;
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self.revalidation_selectors = traversal.shared_context().stylist.num_revalidation_selectors() as u32;
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self.dependency_selectors = traversal.shared_context().stylist.num_dependencies() as u32;
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self.declarations = traversal.shared_context().stylist.num_declarations() as u32;
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self.stylist_rebuilds = traversal.shared_context().stylist.num_rebuilds() as u32;
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}
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/// Returns whether this traversal is 'large' in order to avoid console spam
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/// from lots of tiny traversals.
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pub fn is_large_traversal(&self) -> bool {
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self.elements_traversed >= 50
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}
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}
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@ -86,7 +86,9 @@ pub fn traverse_dom<E, D>(traversal: &D,
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}
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});
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aggregate.finish(traversal, start_time.unwrap());
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println!("{}", aggregate);
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if aggregate.is_large_traversal() {
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println!("{}", aggregate);
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}
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}
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}
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@ -60,6 +60,11 @@ impl fmt::Debug for PropertyDeclarationBlock {
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}
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impl PropertyDeclarationBlock {
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/// Returns the number of declarations in the block.
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pub fn len(&self) -> usize {
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self.declarations.len()
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}
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/// Create an empty block
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pub fn new() -> Self {
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PropertyDeclarationBlock {
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@ -64,6 +64,8 @@ pub fn traverse_dom<E, D>(traversal: &D,
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if dump_stats {
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let tlsc = tlc.borrow_mut();
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tlsc.statistics.finish(traversal, start_time.unwrap());
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println!("{}", tlsc.statistics);
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if tlsc.statistics.is_large_traversal() {
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println!("{}", tlsc.statistics);
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}
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}
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}
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@ -109,13 +109,22 @@ pub struct Stylist {
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rules_source_order: usize,
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/// Selector dependencies used to compute restyle hints.
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state_deps: DependencySet,
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dependencies: DependencySet,
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/// Selectors that require explicit cache revalidation (i.e. which depend
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/// on state that is not otherwise visible to the cache, like attributes or
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/// tree-structural state like child index and pseudos).
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#[cfg_attr(feature = "servo", ignore_heap_size_of = "Arc")]
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selectors_for_cache_revalidation: Vec<Selector<SelectorImpl>>,
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/// The total number of selectors.
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num_selectors: usize,
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/// The total number of declarations.
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num_declarations: usize,
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/// The total number of times the stylist has been rebuilt.
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num_rebuilds: usize,
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}
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/// This struct holds data which user of Stylist may want to extract
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@ -165,9 +174,11 @@ impl Stylist {
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precomputed_pseudo_element_decls: Default::default(),
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rules_source_order: 0,
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rule_tree: RuleTree::new(),
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state_deps: DependencySet::new(),
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dependencies: DependencySet::new(),
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selectors_for_cache_revalidation: vec![],
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num_selectors: 0,
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num_declarations: 0,
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num_rebuilds: 0,
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};
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SelectorImpl::each_eagerly_cascaded_pseudo_element(|pseudo| {
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@ -179,6 +190,31 @@ impl Stylist {
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stylist
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}
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/// Returns the number of selectors.
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pub fn num_selectors(&self) -> usize {
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self.num_selectors
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}
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/// Returns the number of declarations.
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pub fn num_declarations(&self) -> usize {
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self.num_declarations
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}
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/// Returns the number of times the stylist has been rebuilt.
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pub fn num_rebuilds(&self) -> usize {
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self.num_rebuilds
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}
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/// Returns the number of dependencies in the DependencySet.
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pub fn num_dependencies(&self) -> usize {
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self.dependencies.len()
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}
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/// Returns the number of revalidation_selectors.
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pub fn num_revalidation_selectors(&self) -> usize {
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self.selectors_for_cache_revalidation.len()
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}
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/// Update the stylist for the given document stylesheets, and optionally
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/// with a set of user agent stylesheets.
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///
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@ -194,6 +230,7 @@ impl Stylist {
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if !(self.is_device_dirty || stylesheets_changed) {
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return false;
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}
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self.num_rebuilds += 1;
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let cascaded_rule = ViewportRule {
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declarations: viewport::Cascade::from_stylesheets(
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@ -218,10 +255,11 @@ impl Stylist {
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self.precomputed_pseudo_element_decls = Default::default();
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self.rules_source_order = 0;
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self.state_deps.clear();
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self.dependencies.clear();
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self.animations.clear();
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self.selectors_for_cache_revalidation.clear();
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self.num_selectors = 0;
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self.num_declarations = 0;
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extra_data.clear_font_faces();
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@ -240,12 +278,6 @@ impl Stylist {
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self.add_stylesheet(stylesheet, guards.author, extra_data);
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}
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debug!("Stylist stats:");
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debug!(" - Got {} selectors for cache revalidation",
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self.selectors_for_cache_revalidation.len());
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debug!(" - Got {} deps for style-hint calculation",
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self.state_deps.len());
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SelectorImpl::each_precomputed_pseudo_element(|pseudo| {
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if let Some(map) = self.pseudos_map.remove(&pseudo) {
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let declarations =
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@ -273,7 +305,10 @@ impl Stylist {
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match *rule {
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CssRule::Style(ref locked) => {
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let style_rule = locked.read_with(&guard);
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self.num_declarations += style_rule.block.read_with(&guard).len();
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for selector in &style_rule.selectors.0 {
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self.num_selectors += 1;
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let map = if let Some(ref pseudo) = selector.pseudo_element {
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self.pseudos_map
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.entry(pseudo.clone())
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@ -294,7 +329,7 @@ impl Stylist {
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for selector in &style_rule.selectors.0 {
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let needs_cache_revalidation =
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self.state_deps.note_selector(&selector.complex_selector);
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self.dependencies.note_selector(&selector.complex_selector);
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if needs_cache_revalidation {
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self.selectors_for_cache_revalidation.push(selector.clone());
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}
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@ -800,7 +835,7 @@ impl Stylist {
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-> RestyleHint
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where E: TElement,
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{
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self.state_deps.compute_hint(element, snapshot)
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self.dependencies.compute_hint(element, snapshot)
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}
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}
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