Improve performance

[junichi11]

Is your feature request related to a problem? Please describe.

If a file has many lines, scrolling will be slow.
The cause is the start position for searching braces. Currently, this plugin searches them from the top of the file (i.g. offset is 0) because need the correct pair of braces position. Otherwise, colors of braces are changed when we scroll the editor.

Describe the solution you'd like

• If the caret position is near the bottom, search braces from the end of the file.
• Search braces only around the caret position.

Describe alternatives you've considered

[junichi11]

If the caret position is near the bottom, search braces from the end of the file.

Done.