mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2025-05-29 06:22:53 +00:00
5d71758742
The expensive part of creating a segmenter is doing the locale and UCD
data lookups at creation time. Instead of doing this once per text node,
cache the segmenters on the document, and clone them as needed (cloning
is much, much cheaper).
On a profile loading Ladybird's GitHub repo, the following hot methods
changed as follows:
ChunkIterator ctor: 6.08% -> 0.21%
Segmenter factory: 5.86% -> 0%
Segmenter clone: N/A -> 0.09%
58 lines
1.7 KiB
C++
58 lines
1.7 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/String.h>
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#include <AK/Utf16View.h>
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#include <LibUnicode/Forward.h>
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#include <LibWeb/DOM/ChildNode.h>
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#include <LibWeb/DOM/Node.h>
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#include <LibWeb/DOM/NonDocumentTypeChildNode.h>
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namespace Web::DOM {
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// https://dom.spec.whatwg.org/#characterdata
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class CharacterData
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: public Node
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, public ChildNode<CharacterData>
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, public NonDocumentTypeChildNode<CharacterData> {
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WEB_PLATFORM_OBJECT(CharacterData, Node);
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JS_DECLARE_ALLOCATOR(CharacterData);
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public:
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virtual ~CharacterData() override;
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String const& data() const { return m_data; }
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void set_data(String const&);
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unsigned length_in_utf16_code_units() const
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{
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return AK::utf16_code_unit_length_from_utf8(m_data);
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}
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WebIDL::ExceptionOr<String> substring_data(size_t offset_in_utf16_code_units, size_t count_in_utf16_code_units) const;
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WebIDL::ExceptionOr<void> append_data(String const&);
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WebIDL::ExceptionOr<void> insert_data(size_t offset_in_utf16_code_units, String const&);
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WebIDL::ExceptionOr<void> delete_data(size_t offset_in_utf16_code_units, size_t count_in_utf16_code_units);
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WebIDL::ExceptionOr<void> replace_data(size_t offset_in_utf16_code_units, size_t count_in_utf16_code_units, String const&);
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Unicode::Segmenter& grapheme_segmenter() const;
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Unicode::Segmenter& word_segmenter() const;
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protected:
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CharacterData(Document&, NodeType, String const&);
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virtual void initialize(JS::Realm&) override;
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private:
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String m_data;
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mutable OwnPtr<Unicode::Segmenter> m_grapheme_segmenter;
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mutable OwnPtr<Unicode::Segmenter> m_word_segmenter;
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};
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}
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