Commit messages should describe why you're doing something ("X asked", or "[reams of supporting evidence why this needed to be made faster but more confusing]"). It provides context to current reviewers, and future archeologists who wonder what you were drinking at the time. Perhaps you had a good reason for doing [insane thing X]! Perhaps you didn't. If you didn't write it down, they might change or leave it, and break something or prevent something from getting a proper fix.
Code comments should be notes to code-readers that are relevant at all times until changed or deleted. "How to use this", "beware changing X", "Z is hot garbage and should be replaced if used for Q". Ideally you'll have asserts or tests or something that actually enforce this, but of course that's not always a realistic option. Comments in code will follow the code around, and don't require chasing code history through N layers of refactoring and indentation-wars, which is what makes commit messages mostly inappropriate for needs like this.
Commit messages should describe why you're doing something ("X asked", or "[reams of supporting evidence why this needed to be made faster but more confusing]"). It provides context to current reviewers, and future archeologists who wonder what you were drinking at the time. Perhaps you had a good reason for doing [insane thing X]! Perhaps you didn't. If you didn't write it down, they might change or leave it, and break something or prevent something from getting a proper fix.
Code comments should be notes to code-readers that are relevant at all times until changed or deleted. "How to use this", "beware changing X", "Z is hot garbage and should be replaced if used for Q". Ideally you'll have asserts or tests or something that actually enforce this, but of course that's not always a realistic option. Comments in code will follow the code around, and don't require chasing code history through N layers of refactoring and indentation-wars, which is what makes commit messages mostly inappropriate for needs like this.