For what it's worth, there's also a terminal emulator with similar goals (GPU acceleration included): https://github.com/jwilm/alacritty

(¶) Then again, drawing the text is rarely the bottleneck of a text editor (as the sibling post's author correctly points out). It's usually the data structure to represent the text internally and syntax highlighting that have the greatest influence. (Advanced IDE features like syntax checks, linter and indexing aside.)

DirectWrite rasterises glyphs on the GPU when used with Direct2D. GPU path rasterisation was Direct2D's killer feature when it was initially released with Windows 7.

For me, a large file is bigger than available RAM.

You only flatten the string when it's time to write to disk.

For autosave files make sure to store the changes to the rope, not the full text.

[1]: https://i.imgur.com/u4Hovt1.png

OpenGL is not used on Linux or Windows. Jon explained to me that Sublime Text 1.x (Windows only) was OpenGL, but he ran into so many bugs related to poor drivers that he backed away from OpenGL for ST2 and 3.

    :nmap + :let &guifont=substitute(&guifont, '\d\+$', '\=submatch(0) + 1', '')<cr>
    :nmap - :let &guifont=substitute(&guifont, '\d\+$', '\=submatch(0) - 1', '')<cr>
    :nmap _ -

EDIT: By the way, what are you doing that requires handling text files with thousands of columns and gigabytes of text? That sounds very unusual.

However, it's surprising to see people want more rendering speed on their text editors, especially to the point that it would excite them. It's something I've never considered them lacking for their purpose. However, that's probably because I've (nearly) never had the need to handle text files with such characteristics (I usually use it for code and configuration files; none get even close to 1MB), and so to me the text editor is among the fastest, lightest programs I typically run.

rch mentioned scientific data. I guess it's a valid point that there are people working with huge datasets in a practical text file format, and if there are people that can work with huge images or videos on their editors, then why can't text editors do the same.

[0] https://code.visualstudio.com/blogs/2017/10/03/terminal-rend...

1. https://github.com/jwilm/alacritty

Edit: Benchmarks appear to back this up: https://github.com/jhallen/joes-sandbox/tree/master/editor-p...