To some degree, it depends exactly what the topic is, how much detail you're willing to go into, how you want to format it, etc. If you're writing a comprehens

To some degree, it depends exactly what the topic is, how much detail you're willing to go into, how you want to format it, etc. If you're writing a comprehensive tutorial for a new framework or design pattern and including tons of code samples and resource links, that could easily take a good few hours, days or even weeks. Same goes if the topic is kinda niche and you're writing for experts in the field, like how to program an in browser VR experience using the canvas element + multiple libraries and frameworks and cutting edge ES6 features. On the other hand if your post is a bit more modest and mostly deals with a fairly familiar, limited concept, it could probably be done in an hour or less depending on your personal expertise.