# The measurements behind every number

Canonical: https://plottypus.com/data

Last updated: 2026-09-24

data · CC BY 4.0

Each power claim on this site links to the raw capture it came from. Captured on an M5 Pro running macOS 27.0, without sudo, and published as CSV and NDJSON under [CC BY 4.0](https://creativecommons.org/licenses/by/4.0/). Checksums are in [SHA256SUMS](https://plottypus.com/data/SHA256SUMS); the machine-readable catalogue is [index.json](https://plottypus.com/data/index.json).

datasets

## Four datasets

| Dataset | What it holds | Rows | Size |
| --- | --- | --- | --- |
| [macOS 27 IOReport Energy Model publication trace (M5 Pro)](https://plottypus.com/data/macos27-energy-publication-trace) | Raw IOReport CPU Energy, DRAM0 and GPU Energy totals with driver timestamps: 22 publication gaps of 2.2 to 108.5 s, then a 363 s trace with no publication at all. | 3,268 | 893.2 KB |
| [macOS 27 CPU power side by side: macmon, mactop and plottypus (M5 Pro)](https://plottypus.com/data/macos27-cpu-power-side-by-side) | Three simultaneous 1 Hz runs: macmon 0.8.2 and mactop 2.1.5 report 0.0 W CPU in every sample while plottypus 1.0.0 reads 0.18 to 50.5 W. | 320 | 63.2 KB |
| [SMC CPU power rails vs IOReport CPU Energy calibration (Mac17,8, macOS 27)](https://plottypus.com/data/smc-rails-calibration) | Six SMC CPU power rails against IOReport CPU Energy over four publication spans: ratios 0.896 to 0.997. | 765 | 136.2 KB |
| [plottypus self-cost measurements (perf-smoke, M5 Pro, macOS 27)](https://plottypus.com/data/plottypus-self-cost) | CPU, energy, redraws, wakeups and memory of plottypus, btop 1.4.7 and macmon 0.8.2 at 160x45, medians of three 20 s runs, with the load on the machine for each set. | 240 | 54.5 KB |

The story these numbers tell is in [the macOS 27 0.00 W post](https://plottypus.com/blog/macos-27-cpu-power-0w). The same facts are available as [facts.json](https://plottypus.com/facts.json) and through the read-only MCP server described in [llms.txt](https://plottypus.com/llms.txt).