Repeatable benchmarks

[David Smith]

https://smithdc1.github.io/django-asv/#template_benchmarks.template_compilation.benchmark.TemplateCompile.time_template_compile

So we are starting to build up some history now each day which is great.

This chart shows two things.

The long tail history which was run on a single server. This had repeatable results

The more recent daily commits are run on different machines and are much more noisy.

@deepakdinesh1123 and views on making this more repeatable?

@carltongibson any news from the ops team?