Andreas Kling dba6216caa LibWeb: Skip CSS tokenizer filtering when string has no '\r' or '\f' ...

When loading a canned version of reddit.com, we end up parsing many many
shadow tree style sheets of roughly ~170 KiB text each.

None of them have '\r' or '\f', yet we spend 2-3 ms for each sheet just
looping over and reconstructing the text to see if we need to normalize
any newlines.

This patch makes the common case faster in two ways:

- We use TextCodec::Decoder::to_utf8() instead of process()
  This way, we do a one-shot fast validation and conversion to UTF-8,
  instead of using the generic code-point-at-a-time callback API.

- We scan for '\r' and '\f' before filtering, and if neither is present,
  we simply use the unfiltered string.

With these changes, we now spend 0 ms in the filtering function for the
vast majority of style sheets I've seen so far.

2024-07-20 15:35:30 +02:00

..

Block.cpp

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Block.h

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ComponentValue.cpp

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ComponentValue.h

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Declaration.cpp

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Declaration.h

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DeclarationOrAtRule.cpp

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DeclarationOrAtRule.h

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Dimension.h

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Function.cpp

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Function.h

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GradientParsing.cpp

LibWeb: Parse color values using TokenStream

2024-04-22 06:47:05 +02:00

Helpers.cpp

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MediaParsing.cpp

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Parser.cpp

LibWeb/CSS: Make StringStyleValue hold a FlyString

2024-07-17 15:08:44 +01:00

Parser.h

LibWeb/CSS: Support hwb, oklab and oklch color functions

2024-07-06 05:18:00 -06:00

ParsingContext.cpp

LibWeb: Add CSS ParsingContext constructor with a realm and URL

2024-05-16 08:02:43 +02:00

ParsingContext.h

LibWeb: Add CSS ParsingContext constructor with a realm and URL

2024-05-16 08:02:43 +02:00

Rule.cpp

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Rule.h

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SelectorParsing.cpp

LibWeb: Implement the :has() pseudo-class

2024-07-15 11:52:03 +01:00

Token.cpp

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Token.h

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Tokenizer.cpp

LibWeb: Skip CSS tokenizer filtering when string has no '\r' or '\f'

2024-07-20 15:35:30 +02:00

Tokenizer.h

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TokenStream.h

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