- Normalize file ordering
- Capitalize labels

...so experiments run faster

there is no point running much higher as this should already show what we want to show...

Even if we round down to a multiple of 5, we are still including a large part of the shutdown phase. Remove this.

- Support Nginx
- Measure only a 10-second interval to ensure full load

This gives us better numbers than the hard-coded 15-second delay