> Even if user would not notice 5% difference in CPU usage can mean reduction in AWS bill significant enough to care about Users won't notice, but they will n

> Even if user would not notice 5% difference in CPU usage can mean reduction in AWS bill significant enough to care about Users won't notice, but they will notice...? > A test suite usually doesn't run in tightly controlled environment. What don't you have control over? > but not significant enough to spend days to avoid adding a few lines of comments by embedding all knowledge into tests Why would you avoid comments? Why would your tests have to take longer to write than your comments? Days to write a test or two to clarify your intent?