[FEATURE] Implement FastDoubleParser

### 请描述您的需求或者改进建议
*对您想要需求或建议的清晰简洁的描述。*

Faster doubles / float performance.

### 请描述你建议的实现方案
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Use https://github.com/wrandelshofer/FastDoubleParser instead of what we have.

Start by reviewing the repository's existing floating-point parsing implementation and the FastDoubleParser project linked in the issue. No file or test is named, so identify the affected parsing entry point and relevant coverage first. Done means the proposed parser is used and floating-point parsing performance is improved without breaking existing behavior.

Written by the indexing model from the issue text.