//benchmarks · aws ec2 instances
fastest aws ec2 instances, by the numbers.
Single-thread CPU, real on-demand & spot pricing, and observed spot-interruption frequency for every instance type worth running CI on — across four regions. Sort it, filter it, and open any type for the per-region detail. RunsOn launches all of these in your own AWS account.
Looking for a specific shape? The EC2 instance finder filters and compares by CPU, price, memory and architecture in seconds.
ec2 instance finder ↗| # | instance | processor | arch | cpu speed | on-demand | spot / hr | savings | interrupt |
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what the data says
Single-thread CPU leaders by architecture. The newest families — AMD EPYC 9-series on x64, Graviton4 (Neoverse-V2) on arm64 — set the pace.
about these benchmarks
AWS sometimes runs custom CPU SKUs you won't find on Passmark — so it's genuinely hard to know which instance is fastest. Every type here is launched on its 2 vCPU variant and measured with the Passmark single-thread metric, averaged over many days.
Pricing is real: on-demand list price and the trailing spot average per region, with the resulting savings. Interrupt frequency is AWS's published spot-advisor band. As always, run your own benchmarks — this points you in the right direction.
The benchmark is refreshed regularly so RunsOn users can pick the best-performing EC2 instance for their GitHub Actions workflows — launched ephemerally, in your own account.
any instance, in your own account.
The label is a query — name the family or the CPU count and RunsOn launches it ephemerally on spot, one CloudFormation stack, ~10 minutes.