Pareto principle

For many outcomes, roughly 80% of consequences come from 20% of causes

Often known as the 80/20 rule.

This applies to many categories, from computing to sports.

Some examples are:

• 20% of the code has 80% of the bugs
• Fixing 20% of the most reported bugs fixes 80% of all errors
• 80% of execution time is over 20% of the code

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