Doom Speed Demo Archive
https://dsdarchive.com/

Wad: 	   HELINHEL.wad
Map:       10
Skill:     4
Category:  Nomonsters
Exe:       dsda-doom 0.28.3 -complevel 2
Time:      0:05.54
Author:    ELMLE

Comments: Internet was down one day so I started goofing around in this wad, found this little jump. 4 seconds may be possible but I'll let someone else go for that.