In order to improve the performance of tables, VTable uses a fast text measurement scheme [@visactor/vutils TextMeasure](https://github.com/VisActor/VUtil/blob/main/packages/vutils/src/graphics/text/measure/ textMeasure.ts), this text measurement method has better support for English letters and full-width characters, but it may cause measurement errors and incorrect rendering effects for some language characters. For multi-language support issues, there are two support options:
Alphabetical text support scheme
The VTable class provides the method setCustomAlphabetCharSet for users to configure the letters that need to be measured into the alphabet of the measurement tool. Executing it before creating a table instance allows the characters in the alphabet to be measured correctly. Take Cyrillic as an example:
For text without an alphabet, VTable provides a downgrade method for text measurement, restoreMeasureText, which is executed before creating a table instance. It can be restored from the fast text measurement solution to the measureText provided by canvas, which will partially improve the performance of text measurement. Decreased, but can support all text that canvas can measure.
