This was the underlying cause of the restyle_hints_state.html failure.
It was uncovered only when fixing the HAS_EDGE_CHILD_SELECTOR flags because this
was the series of events happening.
* <script> starts executing.
* All the restyle hint processing takes place.
* <script> ends executing, gets appended to the body (I think this is also a bug).
* <body> receives children_changed notification, with an Append mutation.
* <body> had the HAS_EDGE_CHILD_SELECTOR flag, so due to its bogus value, it
restyled the whole tree after <body>, fixing any mishandling of restyle
hints.
The style candidate cache had regressed a few times (see #12534), and my
intuition is that being able to disable all style sharing with a single rule in
the page is really unfortunate.
This commit redesigns the style sharing cache in order to be a optimistic cache,
but then reject candidates if they match different sibling-affecting selectors
in the page, for example.
So far the numbers have improved, but not so much as I'd wanted (~10%/20% of
non-incremental restyling time in general). The current implementation is really
dumb though (we recompute and re-match a lot of stuff), so we should be able to
optimise it quite a bit.
I have different ideas for improving it (that may or may not work), apart of the
low-hanging fruit like don't re-matching candidates all the time but I have to
measure the real impact.
Also, I need to verify it against try.
MSVC support for Servo, and CMake builds for native code
This is the base PR for MSVC builds of servo and dependent crates. It's got replacements in the Cargo.toml to pull in the right versions, to make sure that crates were properly converted to CMake for all other platforms, not just Windows. (Servo builds with MSVC 2015 with this PR; also with 2013, though a manual change in rust-mozjs to select a different set of bindings is needed.)
This PR isn't quite ready yet, but I want bors-servo to do builds.
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10933/shorthands
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This implements the serialization of nearly all of the css shorthand properties with the following exceptions:
1. font - this may be implemented correctly, but I am not 100% sure
2. border-radius - I do not know how to implement this, since I am not familiar with how the property works
3. background - this is implemented, but I think that the implementation might be a tiny bit off.
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Improve File API related comments
r? @Manishearth
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Improve Blob.Size() speed by avoid reading content
r? @Manishearth
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./mach throws error on poor connectivity
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Imported error from socket using `from` since it's the only thing we need.
The exception is [different ](https://docs.python.org/2/library/socket.html#socket.error) from the other exceptions as it could be a string or a tuple with error number.
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layout: Make the stacking context take into account the children transform when calculating overflow areas.
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This is a potential fix for #12842. I have done only the math to handle simple transforms because it's three AM, but I'd like @pcwalton to verify my approach, or suggest an alternative.
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Update webrender + shaders.
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Added OS Links in Markdown
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It is really an improvement to make room for a commit that links contributors to https://janitor.technology
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Fix restyling on viewport resize.
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Fixes https://github.com/servo/servo/issues/12835
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stylo: Use atoms as the pseudo-element back-end.
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A bit of work left, and we can uber-optimize this (left comments, will fill follow-ups), but this is a decent refactor so I thought I'd rather get some feedback on it.
r? @bholley (not formally yet, maybe, but some feedback is appreciated).
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When loading HTTP requests, initialise the request ID only if devtools
are used, to lessen the pressure put on the RNG initialisation.
This tentatively fixes#11100 on OS X.
