Hi! I'm struggling with the same problems (Debugging huge ASM.js files).
The best modern, non-vim editor to handle such files I've found is Cuda Text: http://uvviewsoft.com/cudatext/
Absolutely top tier lightweight code editor for special tasks.
Absolutely top tier lightweight code editor for special tasks.
worth a look if you do this a lot.
UltraEdit is very sluggish - to the moment it's not usable to work with.
I did a very subjective comparison between few editors in terms of speed in working with such file (flow is: open, find, manually edit, save). And in my eyes here is the result: 1. Cuda Text 2. Sublime 4 3. VS Code 6. UltraEdit
Please note: I only tested the workflow that I work on daily basis. I can see that UltraEdit can do much more that Cuda Text, and in different test cases probably it will be a much better choice. But not for me.