Dictionaries that we never initialize with JS values don't need a full-featured
Init() method. Instead, we output a cut-down Init() method that doesn't even
take a JSContext and Value as argument, and skips as much work as it can. It
uses constant-false for "is the value present?", but also, to avoid compilation
errors due to use of `cx` and `val` in now-dead conversion code, it tells the
native-to-JS conversion machinery that the value is always missing, which lets
it skip most of the the work it would normally try to do and just output
initialization to the default value. We only need to do this for members that
have default values; the others either remain no-passed or are required members
with no default-initialization behavior.
This saves about 330KB of codesize on Linux64 without PGO and 285KB with PGO.
Differential Revision: https://phabricator.services.mozilla.com/D48007
--HG--
extra : moz-landing-system : lando
For review purposes, the important changes are in dom/bindings/Configuration.py
and dom/bindings/parser.
The changes to the IDL files were done by running these in dom/webidl
and dom/bindings/test:
perl -pi -e 's/^interface ([A-Za-z0-9_]+)($| [:{])/[Exposed=Window]\ninterface \1\2/' *.webidl
perl -pi -e 'BEGIN { $/ = undef; } s/\[HTMLConstructor\]\n\[Exposed=Window\]/[HTMLConstructor,\n Exposed=Window]/g' *.webidl
perl -pi -e 'BEGIN { $/ = undef; } s/\[NoInterfaceObject\]\n\[Exposed=Window\]/[NoInterfaceObject,\n Exposed=Window]/g' *.webidl
perl -pi -e 'BEGIN { $/ = undef; } s/\[ChromeOnly\]\n\[Exposed=Window\]/[ChromeOnly,\n Exposed=Window]/g' *.webidl
And running this in dom/chrome-webidl:
perl -pi -e 'BEGIN { $/ = undef; } s/\[ChromeOnly\]\ninterface/[ChromeOnly, Exposed=Window]\ninterface/g' *.webidl
and then fixing all the resulting parser failures. I then verified that the
generated code is the same as before this change.
Differential Revision: https://phabricator.services.mozilla.com/D46697
--HG--
extra : moz-landing-system : lando
`= {}` can now be used to indicate that an optional dictionary should have the
default value of 'default-initialized dictionary'
Differential Revision: https://phabricator.services.mozilla.com/D36504
--HG--
extra : moz-landing-system : lando
`= {}` can now be used to indicate that an optional dictionary should have the
default value of 'default-initialized dictionary'
Differential Revision: https://phabricator.services.mozilla.com/D36504
--HG--
extra : moz-landing-system : lando
`= {}` can now be used to indicate that an optional dictionary should have the
default value of 'default-initialized dictionary'
Differential Revision: https://phabricator.services.mozilla.com/D36504
--HG--
extra : moz-landing-system : lando
We add a [MOZ_CAN_RUN_SCRIPT_BOUNDARY] opt-out for now to keep the tree
compiling. The naming purposefully matches the C++ annotation that has a
similar effect, top make it easy to search for.
Differential Revision: https://phabricator.services.mozilla.com/D23520
--HG--
extra : moz-landing-system : lando
Boris Zbarsky
Cosmin Sabou
Mihai Alexandru Michis
Andrea Marchesini