"It's opt-out, but it's easy to change." We really need objective usability measures to be applied to ensure it really is easy.
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I love how the CommonMark Spec has a test suite that's just a JSON array. It's really easy to test a library for compliance, and I've seen developers nerd-sniped into full compliance.
https://spec.commonmark.org/0.31.2/spec.json
It's really satisfying to use a profiler for the first time on a project. I always find a big performance win with only a small code change.
It's never the code that I expected to be slow, however!
@MekahimeAkari @lifning "C makes it easy to shoot yourself in the foot; C++ makes it harder, but when you do it blows your whole leg off". -- Real Stroustrup quote, 1986