A few months ago I started an open-source benchmark suite (MIT, not affiliated with any provider) that provisions the same sysbench + fio tests on all configured instance-types, then destroys them. It now supports 7 providers and more than 6 months of pricing and performance data.

The latest addition, UpCloud, showed quite good performance, adding another european provider to the top in terms of price/performance. Upcloud also offered the best disk speed I have seen so far for small to medium sized instances.

You can find the dashboard at https://fabianwimberger.github.io/cloud-bench/ and the source + logs under https://github.com/fabianwimberger/cloud-bench - feel free to leave me some feedback or request instances for comparison!