mirrors/ladybird
0
0
Fork 0
mirror of https://github.com/LadybirdBrowser/ladybird.git synced 2025-04-22 04:25:13 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 9

LibUnicode: Use binary search for lookups into the generated emoji data

Browse source 
This sorts the array of generated emoji data by code point (first by
code point length, then by code point value). This lets us use a binary
search to find emoji data, rather than the current linear search.

In a profile of scrolling around /home/anon/Documents/emoji.txt, this
reduces the runtime of Gfx::Emoji::emoji_for_code_points from 69.03% to
28.42%. Within that, Unicode::find_emoji_for_code_points reduces from
28.42% to just 1.95%.
This commit is contained in:
Timothy Flynn 2023-03-05 10:14:25 -05:00 • committed by Andreas Kling
parent 2bc54ae56a
commit ca2b030336
Notes: sideshowbarker 2024-07-17 08:35:21 +09:00
1 changed files with 51 additions and 20 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

71
Meta/Lagom/Tools/CodeGenerators/LibUnicode/GenerateEmojiData.cpp
View file

@ -7,6 +7,7 @@
#include "GeneratorUtil.h"
#include <AK/AnyOf.h>
#include <AK/DeprecatedString.h>
#include <AK/QuickSort.h>
#include <AK/SourceGenerator.h>
#include <AK/StringUtils.h>
#include <AK/Types.h>
@ -306,13 +307,27 @@ static constexpr Array<EmojiData, @emojis_size@> s_emojis { {)~~~");
generator.append(R"~~~(
} };
struct EmojiCodePointComparator {
constexpr int operator()(ReadonlySpan<u32> code_points, EmojiData const& emoji)
{
auto emoji_code_points = emoji.code_points();
if (code_points.size() != emoji_code_points.size())
return static_cast<int>(code_points.size()) - static_cast<int>(emoji_code_points.size());
for (size_t i = 0; i < code_points.size(); ++i) {
if (code_points[i] != emoji_code_points[i])
return static_cast<int>(code_points[i]) - static_cast<int>(emoji_code_points[i]);
}
return 0;
}
};
Optional<Emoji> find_emoji_for_code_points(ReadonlySpan<u32> code_points)
{
for (auto& emoji : s_emojis) {
if (emoji.code_points() == code_points)
return emoji.to_unicode_emoji();
}
if (auto const* emoji = binary_search(s_emojis, code_points, nullptr, EmojiCodePointComparator {}))
return emoji->to_unicode_emoji();
return {};
}
@ -400,22 +415,8 @@ ErrorOr<int> serenity_main(Main::Arguments arguments)
TRY(validate_emoji(emoji_resource_path, emoji_data));
}
size_t code_point_array_index { 0 };
for (auto& emoji : emoji_data.emojis) {
emoji.code_point_array_index = code_point_array_index;
code_point_array_index += emoji.code_points.size();
for (auto& emoji : emoji_data.emojis)
set_image_path_for_emoji(emoji_resource_path, emoji_data, emoji);
}
if (!generated_header_path.is_empty()) {
auto generated_header_file = TRY(open_file(generated_header_path, Core::File::OpenMode::Write));
TRY(generate_emoji_data_header(*generated_header_file, emoji_data));
}
if (!generated_implementation_path.is_empty()) {
auto generated_implementation_file = TRY(open_file(generated_implementation_path, Core::File::OpenMode::Write));
TRY(generate_emoji_data_implementation(*generated_implementation_file, emoji_data));
}
if (!generated_installation_path.is_empty()) {
TRY(Core::Directory::create(LexicalPath { generated_installation_path }.parent(), Core::Directory::CreateDirectories::Yes));
@ -424,5 +425,35 @@ ErrorOr<int> serenity_main(Main::Arguments arguments)
TRY(generate_emoji_installation(*generated_installation_file, emoji_data));
}
if (!generated_header_path.is_empty()) {
auto generated_header_file = TRY(open_file(generated_header_path, Core::File::OpenMode::Write));
TRY(generate_emoji_data_header(*generated_header_file, emoji_data));
}
if (!generated_implementation_path.is_empty()) {
quick_sort(emoji_data.emojis, [](auto const& lhs, auto const& rhs) {
if (lhs.code_points.size() != rhs.code_points.size())
return lhs.code_points.size() < rhs.code_points.size();
for (size_t i = 0; i < lhs.code_points.size(); ++i) {
if (lhs.code_points[i] < rhs.code_points[i])
return true;
if (lhs.code_points[i] > rhs.code_points[i])
return false;
}
return false;
});
size_t code_point_array_index { 0 };
for (auto& emoji : emoji_data.emojis) {
emoji.code_point_array_index = code_point_array_index;
code_point_array_index += emoji.code_points.size();
}
auto generated_implementation_file = TRY(open_file(generated_implementation_path, Core::File::OpenMode::Write));
TRY(generate_emoji_data_implementation(*generated_implementation_file, emoji_data));
}
return 0;
}