Re: [I] [C++] Use SIMD to retrofit and optimize furycpp [fury]

["pandalee99 (via GitHub)" <gi...@apache.org>]

pandalee99 commented on issue #2013:
URL: https://github.com/apache/fury/issues/2013#issuecomment-2601831044

   <img width="396" alt="Image" src="https://github.com/user-attachments/assets/c52acd36-e0ff-4c08-afe2-8507c1e21768" />
   
   About [simdutf](https://github.com/simdutf/simdutf) then, I used `Single-header version` and did a simple test
   
   ``` c++
   std::string utf16ToUtf8WithSIMDUTF(const std::u16string &utf16) {
     // Get the length of the input UTF-16LE string
     size_t utf16_length = utf16.length();
     // Calculate the number of bytes required to convert UTF-16LE to UTF-8
     size_t utf8_length = simdutf::utf8_length_from_utf16le(reinterpret_cast<const char16_t *>(utf16.data()), utf16_length);
     // Create a string to store the UTF-8 result, initialized to the specified length
     std::string utf8_result(utf8_length, '\0');
     // Call convert_utf16le_to_utf8 to perform the conversion
     size_t written_bytes = simdutf::convert_utf16le_to_utf8(reinterpret_cast<const char16_t *>(utf16.data()), utf16_length, utf8_result.data());
     // Resize the string to match the actual number of written bytes
     utf8_result.resize(written_bytes);
     return utf8_result;
   }
   ```
   
   The operation efficiency is not as efficient


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