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Dump traversal time with other style statistics.

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This commit is contained in:
Bobby Holley 2017-02-14 16:13:21 -08:00
parent 5a624ff956
commit d7d6979144
3 changed files with 28 additions and 5 deletions
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13
components/style/context.rs
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@ -25,6 +25,7 @@ use std::sync::{Arc, Mutex};
use std::sync::mpsc::Sender;
use stylist::Stylist;
use thread_state;
use time;
use timer::Timer;
/// This structure is used to create a local style context from a shared one.
@ -120,17 +121,22 @@ pub struct TraversalStatistics {
pub elements_matched: u32,
/// The number of cache hits from the StyleSharingCache.
pub styles_shared: u32,
/// Time spent in the traversal, in milliseconds.
pub traversal_time_ms: f64,
}
/// Implementation of Add to aggregate statistics across different threads.
impl<'a> Add for &'a TraversalStatistics {
type Output = TraversalStatistics;
fn add(self, other: Self) -> TraversalStatistics {
debug_assert!(self.traversal_time_ms == 0.0 && other.traversal_time_ms == 0.0,
"traversal_time_ms should be set at the end by the caller");
TraversalStatistics {
elements_traversed: self.elements_traversed + other.elements_traversed,
elements_styled: self.elements_styled + other.elements_styled,
elements_matched: self.elements_matched + other.elements_matched,
styles_shared: self.styles_shared + other.styles_shared,
traversal_time_ms: 0.0,
}
}
}
@ -139,11 +145,13 @@ impl<'a> Add for &'a TraversalStatistics {
/// See https://bugzilla.mozilla.org/show_bug.cgi?id=1331856#c2
impl fmt::Display for TraversalStatistics {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
debug_assert!(self.traversal_time_ms != 0.0, "should have set traversal time");
try!(writeln!(f, "[PERF] perf block start"));
try!(writeln!(f, "[PERF],elements_traversed,{}", self.elements_traversed));
try!(writeln!(f, "[PERF],elements_styled,{}", self.elements_styled));
try!(writeln!(f, "[PERF],elements_matched,{}", self.elements_matched));
try!(writeln!(f, "[PERF],styles_shared,{}", self.styles_shared));
try!(writeln!(f, "[PERF],traversal_time_ms,{}", self.traversal_time_ms));
writeln!(f, "[PERF] perf block end")
}
}
@ -165,6 +173,11 @@ impl TraversalStatistics {
pub fn should_dump() -> bool {
*DUMP_STYLE_STATISTICS || opts::get().style_sharing_stats
}
/// Computes the traversal time given the start time in seconds.
pub fn compute_traversal_time(&mut self, start: f64) {
self.traversal_time_ms = (time::precise_time_s() - start) * 1000.0;
}
}
/// A task to be run in sequential mode on the parent (non-worker) thread. This