Emacs freezes when editing a file with one extremely long line even with so-long-minor-mode enabled.

[Hongyi Zhao]

I try to use Emacs to open and check the file [1], which includes one
extremely long line as follows:


$ emacs -Q symbols.ts

`M-x so-long-minor-mode RET`

At this moment, Emacs still freezes. Any hints for tackling this problem?

[1] 
https://github.com/feisele/vscode-gap-language-support/blob/master/src/symbols.ts

Regards
-- 
Assoc. Prof. Hongsheng Zhao <hongyi.zhao@gmail.com>
Theory and Simulation of Materials
Hebei Vocational University of Technology and Engineering
No. 473, Quannan West Street, Xindu District, Xingtai, Hebei province