There is one sentence missing from each graph that would've made this a lot easier to grok:

"x is better" where x is more requests, faster startup time, or less memory usage.

I prefer graphs that lead me to what I should expect and that sentence would go a long way to eliminate the "mental math" I had to do to understand each one.

On another note, the 2 year graphs are particularly interesting. They're more consistent than not but those inconsistencies seem a little awkward.