[pwg]

If the editor has some built in line length limit then exceeding that limit might lead to a crash (depending upon how the editor is coded).

[gnator]

Right but it looks like (i was able to load it for Atom and Notepad++ but very slow) they perform soft wrap on these long lines

[pwg]

Which would imply that their soft-wrap algorithm consumes an inordinate amount of time when confronted with a single, 9MB long, line of space characters.