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Keyboard. It’s got hotkeys for the most used characters. It’s so much faster than manually drawing each character in Paint.
Wow, my MS paint workflow is feeling attacked right now.
You don't have to use every shortcut you know.
People need to think too, and the less repetitive one's workflow, the less time one has to think.
Time efficiency gains assume practically infinite cognitive resources. Normal human workflow is think/execute/think/execute. Jobs that are only think/think/think/think are unnatural and fuck up your brain. Especially if you think of reality as a sort of test suite you can run against new neural patterns to weed out the ones built on unreliable patterns.
So you do you bro. You take your time on those precious chars. I do recommend you learn chinese in that case though, or Egyptian heiroglyphics. You get a lot more information out of each bmp file that way.
I haven't used CJK languages in a long time, but for a while I was running a Japanese version of Windows NT and for text input there was an option to draw the character in a small paint window.