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style: Add an atom bit to know whether we're ascii lowercase.

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And thus massively speed up ascii-case-insensitive atom comparisons when both
atoms are lowercase (which is the common case by far).

This removes almost all the slow selector-matching in this page, and it seems
an easier fix than storing the lowercased version of all class-names in quirks
mode in elements and selectors...

Differential Revision: https://phabricator.services.mozilla.com/D10945
This commit is contained in:
Emilio Cobos Álvarez 2018-11-13 12:47:40 +00:00
parent d8bd29292e
commit f486ef7e47
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2 changed files with 47 additions and 35 deletions
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4
components/style/gecko/regen_atoms.py
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@ -16,8 +16,8 @@ sys.path.insert(0, os.path.join(os.path.dirname(GECKO_DIR), "properties"))
import build
# Matches lines like `GK_ATOM(foo, "foo", 0x12345678, nsStaticAtom, PseudoElementAtom)`.
PATTERN = re.compile('^GK_ATOM\(([^,]*),[^"]*"([^"]*)",\s*(0x[0-9a-f]+),\s*([^,]*),\s*([^)]*)\)',
# Matches lines like `GK_ATOM(foo, "foo", 0x12345678, true, nsStaticAtom, PseudoElementAtom)`.
PATTERN = re.compile('^GK_ATOM\(([^,]*),[^"]*"([^"]*)",\s*(0x[0-9a-f]+),\s*[^,]*,\s*([^,]*),\s*([^)]*)\)',
re.MULTILINE)
FILE = "include/nsGkAtomList.h"