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Better defaults

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David Peter committed 2026-10-06 12:53:42 +02:00
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README.md
+11 -8
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@@ -58,9 +58,11 @@ hyperfine \
'./baseline' './candidate'
```
Use `--metrics=default` for the platform defaults or `--metrics=all` for all available
metrics in the order listed below, with wall-clock time primary. Both presets choose display
units automatically and must be used alone, without other metrics or unit suffixes.
Use `--metrics=default` for the platform defaults, `--metrics=speed` for
`time_wall_clock,time_user,time_system`, or `--metrics=all` for all available metrics in the
order listed below. The `speed` preset works on all platforms, including with a shell.
All presets keep wall-clock time primary, choose display units automatically, and must be
used alone, without other metrics or unit suffixes.
The `all` preset skips metrics unsupported by the platform or shell, or missing from any run
of a benchmark. If a metric is unavailable for the reference, its change displays as `N/A`.
@@ -69,12 +71,13 @@ standard deviation, minimum, and maximum. The first benchmark has no change colu
For subsequent commands, a change of `+50.0%` means
the mean is 50% greater than the reference; `-20.0%` means it is 20% smaller. These percentages
describe the observed means, not statistical significance. Decreases are green and increases
are red when colors are enabled; signs remain visible without color. A percentage change from
a zero reference is undefined and displays as `N/A`.
are red when colors are enabled; signs remain visible without color.
A percentage change from a zero reference is undefined and displays as `N/A`.
The **first metric is primary**: it is emphasized in terminal output and is the only metric
in non-JSON exports. All comparisons use the first command as their reference, regardless
of which metric is primary. There is no sorting or separate reference selection.
The **first metric is primary**: its entire terminal row is bold, and it is the only metric
in non-JSON exports. All metric rows use colors when enabled. All comparisons use the first
command as their reference, regardless of which metric is primary. There is no sorting or
separate reference selection.
| Metrics | Explicit units |
|:---|:---|