We have already called FlushDelayedResize(false) earlier in this method, and
after bug 1583534 that queues a reflow if one is needed. All the boolean
controls is whether reflows are processed by the FlushDelayedResize call.
Since we plan to process reflows anyway a few lines later, there is no need to
do that explicitly that via FlushDelayedResize(true).
Differential Revision: https://phabricator.services.mozilla.com/D47287
--HG--
extra : moz-landing-system : lando
Does what it says on the tin. Once we have a central scheduling
system this should likely just consume that.
Differential Revision: https://phabricator.services.mozilla.com/D35454
--HG--
extra : moz-landing-system : lando
The first run loads more things into the StartupCache than are
used on the second and subsequent runs. This just ensures that if
the StartupCache diverges too far from its actual use that we will
rebuild it.
Differential Revision: https://phabricator.services.mozilla.com/D34654
--HG--
extra : moz-landing-system : lando
The signatures were updated in the previous patch to hand us the raw,
uncopied buffers. This just adjusts the callsites to match.
Differential Revision: https://phabricator.services.mozilla.com/D34653
--HG--
extra : moz-landing-system : lando
I am not aware of anything that depends on StartupCache being a
zip file, and since I want to use lz4 compression because inflate
is showing up quite a lot in profiles, it's simplest to just use
a custom format. This loosely mimicks the ScriptPreloader code,
with a few diversions:
- Obviously the contents of the cache are compressed. I used lz4
for this as I hit the same file size as deflate at a compression
level of 1, which is what the StartupCache was using previously,
while decompressing an order of magnitude faster. Seemed like
the most conservative change to make. I think it's worth
investigating what the impact of slower algs with higher ratios
would be, but for right now I settled on this. We'd probably
want to look at zstd next.
- I use streaming compression for this via lz4frame. This is not
strictly necessary, but has the benefit of not requiring as
much memory for large buffers, as well as giving us a built-in
checksum, rather than relying on the much slower CRC that we
were doing with the zip-based approach.
- I coded the serialization of the headers inline, since I had to
jump back to add the offset and compressed size, which would
make the nice Code(...) method for the ScriptPreloader stuff
rather more complex. Open to cleaner solutions, but moving it
out just felt like extra hoops for the reader to jump through
to understand without the benefit of being more concise.
Differential Revision: https://phabricator.services.mozilla.com/D34652
--HG--
extra : moz-landing-system : lando
Adds an explicit error mapping function to Result, to simplify
using MOZ_TRY... macros.
Differential Revision: https://phabricator.services.mozilla.com/D47466
--HG--
extra : moz-landing-system : lando
This just splits out the InputBuffer and OutputBuffer helper classes
to make it cleaner for the StartupCache to include them.
Differential Revision: https://phabricator.services.mozilla.com/D34651
--HG--
extra : moz-landing-system : lando
This will not behave exactly the same if we had previously written bad
data for the entry that would fail to decompress. I imagine this is rare
enough, and the consequences are not severe enough, that this should be
fine.
Differential Revision: https://phabricator.services.mozilla.com/D30643
--HG--
extra : moz-landing-system : lando
I thought I had already written out the patch to remove these, but
apparently not. Per discussion in the startup cache telemetry bug,
there should be no reason for doing this.
Differential Revision: https://phabricator.services.mozilla.com/D31491
--HG--
extra : moz-landing-system : lando
I opted to go with what I perceived as the more expedient route
of leaving lz4 roughly where it is and just adding to that. The
biggest complication was xxhash, which is included elsewhere.
I'm not generally proficient with build-related things though so
my solution may be wrong and not just ugly.
Differential Revision: https://phabricator.services.mozilla.com/D30640
--HG--
rename : mfbt/lz4.c => mfbt/lz4/lz4.c
rename : mfbt/lz4.h => mfbt/lz4/lz4.h
extra : moz-landing-system : lando
Also adds overloads of JS_StringEqualsAscii and JS_FlatStringEqualsAscii that pass in a length.
Differential Revision: https://phabricator.services.mozilla.com/D47392
--HG--
extra : moz-landing-system : lando
Right now toolchain tasks that aren't dependencies of requested tasks
will run in response to source code changes only if the files are in the
sparse profile. That is, taskgraph calculates the digest based on just
the files in those directories that are in the sparse profile, and will
rebuild it when those files change. This changes ensures that more
geckodriver files are used to calculate the digest, and thus changes
to them will cause geckodriver to be rebuilt.
As more things depend on the geckodriver toolchain tasks directly this
becomes less valuable and can be removed from the sparse profile.
Differential Revision: https://phabricator.services.mozilla.com/D47459
--HG--
extra : moz-landing-system : lando
Abstracts the pointer unboxing pattern for both NUNBOX32 and PUNBOX64
formats. This also encapsulates some of the spectre mitigations.
Differential Revision: https://phabricator.services.mozilla.com/D46326
--HG--
extra : moz-landing-system : lando
Now that all the bad type-punning is gone, JS::Value has a single
asBits_ field and we should use a class aggregate type instead.
Differential Revision: https://phabricator.services.mozilla.com/D46325
--HG--
extra : moz-landing-system : lando
Use well-defined conversions on the asBits_ instead. This removes union
arms entirely. They are slighly useful for debugging, but we don't have
that on our 64-bit platforms and the gdb helpers can already help us
out.
Differential Revision: https://phabricator.services.mozilla.com/D46324
--HG--
extra : moz-landing-system : lando
