giving accurate estimations
think first and code second, often newbies tend to start coding immediatly and change their code 3 or 4 times before the final solution, which could be improved with a good solution design before coding
Think of all the "moving parts". With experience we tend to be a lot more thoughtful on what is happening under the hood, where we are using to many cpu cycles, what is our code's ram usage or network traffic for example
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We strive for transparency and don't collect excess data.