Upgrading to the `LTS-20.26` implies ~100x performance regression for functions using dynamic templates.

[silencespeakstruth]

Origin issue belongs to the parsec which is used for parsing dynamic templates. In a few words, parsec-3.1.15.0 misperforms badly compared to the parsec-3.1.14.0.

I am copying the issue here such that more folks become aware of it (and possibly elaborate on further investigation, if any). Please stay sharp.