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layout: Implement parallel reflow for the bubble-widths and

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assign-heights phases.

This uses the new work-stealing deque. By default, 3/4 of a thread per
logical CPU is used. This can be tuned with the `-y` flag.

I measured a 65% reflow speedup on `perf-rainbow.html` and a 247% reflow
speedup on `http://en.wikipedia.org/wiki/South_China_Sea` on a 4-core
HyperThreaded Core i7. However, numbers were fairly volatile, especially
for the latter.
This commit is contained in:
Patrick Walton 2014-01-14 14:57:40 -08:00
parent 539cf58f73
commit 54f0f17f83
21 changed files with 706 additions and 141 deletions
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10
src/components/gfx/render_task.rs
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@ -25,7 +25,7 @@ use extra::arc::Arc;
use buffer_map::BufferMap;
use display_list::DisplayList;
use font_context::FontContext;
use font_context::{FontContext, FontContextInfo};
use opts::Opts;
use render_context::RenderContext;
@ -159,9 +159,11 @@ impl<C: RenderListener + Send,T:Send+Freeze> RenderTask<C,T> {
port: port,
compositor: compositor,
constellation_chan: constellation_chan,
font_ctx: ~FontContext::new(opts.render_backend.clone(),
false,
profiler_chan.clone()),
font_ctx: ~FontContext::new(FontContextInfo {
backend: opts.render_backend.clone(),
needs_font_list: false,
profiler_chan: profiler_chan.clone(),
}),
opts: opts,
profiler_chan: profiler_chan,