EC2 instance size: t3.nano seems to work...?

[pmeenan]

Oh, it will "work" but the results will be worthless. You want a c4.large (or something along those lines) for consistent results.

The t* line are burstable CPU performance so the first few tests will run fast and then the CPU will be throttled and the rest of the tests will be MUCH slower (and every now and then burst faster).

Outside of never using the t* series, you need to make sure you have enough CPU horsepower to be representative of your visitors. Using too slow of a VM (too few VCPUs) will cause the JS to run much slower.