keygen VS a200

This makes it hard to find alt layouts that feel comfortable with Vim. I've tried RSTHD, BEAKL 15, ISRT, and a couple failed attempts at designing my own layout with xsznix's optimizer. Maybe I am just picky. I currently use Dvorak, which has nice j k positions, but of course it is an old layout that is beat in many metrics by more recent layouts.

There are also tools to optimise the layout based on the text & rules you like, for example: https://github.com/xsznix/keygen.

In addition to KLA, check out the ADNW Optimising keyboard layouts program (C++). If you're into Rust, look at the RSTHD keygen. Note that they all have their own peculiarities/biases and none of them should be used blindly. Understand what their various e.g. penalties are and tweak their code/configs to better match your personal needs and corpus.

I forked xsznix/keygen (origin of RSTHD layout), tweaked it with my own weightings as well as generally playing around with the code a bit, and here’s what came out:

It's computationally intensive task and it takes time to optimize layout, people spend weeks on full optimizations, hours and days in more simple cases. There are several optimizers like carpalx, opt, keygen etc.

For instance the RSTHD creater has created a rust program that optimizes a layout using efforts for certain keys: https://github.com/xsznix/keygen There are other similar programs out there as well.

Back to SFBs: I'm getting the same result with the tool you provided, but the before mentioned a200 tool (https://github.com/ClemenPine/a200) gives me 2,73% and now I'm wondering where does the discrepancy come from.

genkey is usually what's used, you can also use your own corpus with it. a200 is also pretty useful but might not work on windows

More importantly it's got things to look for in section 2: stats to rate a layout by, usually generated by the DH analyser, genkey (from the person who created Semimak) and lately the a200 analyser (by the person who created the Pine layouts). In a very general sense, sfb >> dsfb > redirects with onehands, rolls and alternation being personal preference, given a sensible hand and finger balance. Stats shouldn't be a crutch to justify a certain layout, but they can give valuable insight in how a layout does in certain aspects and how it will perform generally. Even people who do know what they're doing rely on analysers a lot for sanity checks as they make misakes really easy to spot. Creating layouts is a lot of fun though, and me and the homies in the alt layout discord are always willing to help :)