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Transition events are not yet supported, and the only animatable
properties are `top`, `right`, `bottom`, and `left`. However, all other
features of transitions are supported. There are no automated tests at
present because I'm not sure how best to test it, but three manual tests
are included.
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------------------------------------------------------------------------
BEFORE AFTER
------------------------------------------------------------------------
util::memory util::mem
- heap_size_of - heap_size_of (unchanged)
- SizeOf - HeapSizeOf
- size_of_excluding_self - heap_size_of_children
prof::mem prof::mem
- MemoryProfilerChan - ProfilerChan
- MemoryReport - Report
- MemoryReportsChan - ReportsChan
- MemoryReporter - Reporter
- MemoryProfilerMsg - ProfilerMsg
- {R,UnR}egisterMemoryReporter - {R,UnR}egisterReporter
- MemoryProfiler - Prof
- ReportsForest - ReportsForest (unchanged)
- ReportsTree - ReportsTree (unchanged)
- SystemMemoryReporter - SystemReporter
prof::time prof::time
- TimeProfilerChan - ProfilerChan
- TimerMetadata - TimerMetadata (unchanged)
- Formatable - Formattable [spelling!]
- TimeProfilerMsg - ProfilerMsg
- TimeProfilerCategory - ProfilerCategory
- TimeProfilerBuckets - ProfilerBuckets
- TimeProfiler - Profiler
- TimerMetadataFrameType - TimerMetadataFrameType (unchanged)
- TimerMetadataReflowType - TimerMetadataReflowType (unchanged)
- ProfilerMetadata - ProfilerMetadata (unchanged)
In a few places both prof::time and prof::mem are used, and so
module-qualification is needed to avoid overlap, e.g. time::Profiler and
mem::Profiler. Likewise with std::mem and prof::mem. This is not a big
deal.
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- Most of util::memory has been moved into profile::mem, though the
`SizeOf` trait and related things remain in util::memory. The
`SystemMemoryReporter` code is now in a submodule
profile::mem::system_reporter.
- util::time has been moved entirely into profile::time.
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This changeset implements the beginnings of fine-grained measurement of
Servo's data structures.
- It adds a new `SizeOf` trait, which is used to measure the memory used
by heap data structures, and implements it for some std types: Box,
String, Option, Arc, Vec, and DList.
- It adds a new `MemoryReporter` trait which is used to report memory
measurements from other threads to the memory profiler. Reporters are
registered and unregistered with the memory profiler, and the memory
profiler makes measurement requests of reporters when necessary.
- It plumbs a MemoryProfilerChan through to the layout task so it can
register a memory reporter.
- It implements the `SizeOf` trait for `DisplayList` and associated
types, and adds a memory reporter that uses it.
The display list hits 14.77 MiB when viewing
tests/html/perf-rainbow.html, and 2.51 MiB when viewing the Guardians of
the Galaxy Wikipedia page from servo-static-suite. Example output:
0.29: display-list::http://www.reddit.com/
0.00: display-list::http://static.adzerk.net/reddit/ads.html?sr=-reddit.com,loggedout&bust2#http://www.reddit.com
0.00: display-list::http://www.reddit.com/static/createadframe.html
There are a number of FIXME comments indicating sub-optimal things. This
is a big enough change for now that doing them as follow-ups seems best.
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This used to conflict with the util crate from the standard library, which
has long since been removed.
The import in layout has not been changed because of a conflict with the
util mod there.
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It is possible for a PaintTask to start exiting soon after sending new
buffers to the compositor. In that case, the compositor should return
the now unnecessary buffers to the PaintTask so that it can properly
free them.
To accomplish this, the compositor now keeps a hash map of paint task
channels per pipeline id. When a PaintTask exists, the constellation
informs the compositor that it can forget about it. Additionally, the
PaintTask should not wait for any buffers when the engine is doing a
complete shutdown. In that case, the compositor is already halted and
has simply let all buffers leak. We pipe through the shutdown type when
destroying the pipeline to make this decision.
Fixes #2641.
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Fixes #3346.
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