Coreload: GitHub Actions runners Blacksmith alternatives
On Coreload you change a job's runs-on label, so you can move one job at a time and keep the rest on Blacksmith.
Coreload, measured against Blacksmith
- At 2 vCPU, Blacksmith's single-thread speed was 0.63× Coreload's and its all-core speed per vCPU 0.87×, the median of 3 runs, measured 2026-11-04.
- Coreload's 2-vCPU runner exposed 3 vCPUs to the job, so these ratios compare per vCPU.
The method, every run and the raw data are on the benchmarks page. Blacksmith was measured with our own Blacksmith account.
Move a job
Install the GitHub App, then change the job's runs-on from its Blacksmith label to ours. The migration guide shows which Blacksmith sizes have a Coreload size today and which are coming.
Other alternatives
Each link opens a page that quotes the provider's own pages, with a link to each page and the date we read it.
- GitHub-hosted runners: what GitHub publishes.
- Namespace: what Namespace publishes.
- Depot: what Depot publishes.
- RunsOn: what RunsOn publishes.
Questions
- Where are the Coreload and Blacksmith measurements? On this page, at each size both were run at, and on the benchmarks page with the method, every run and the raw data.
- How do I move from Blacksmith? Change
runs-onon one job and keep the rest where they are; the migration guide shows which sizes map today.