time

Testing & Quality

Command execution timing — microsecond precision, statistical analysis, comparison. Zero barrier — use with x-cmd or shell built-in time command. Use for "timing", "benchmark", "performance", "profiling".

QUICK START

How to use this skill

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Prompt to paste

I want to install this Agent Skill for this project in Codex.

Source SKILL.md: https://github.com/x-cmd/x-cmd/blob/HEAD/mod/skill0/lib/skill0/skills/time/SKILL.md

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time — skill0

Measure command execution time. From single-shot microsecond timing to multi-run statistical analysis.

Quick Start

# With x-cmd
x time <command>                      # Single microsecond timing
x time stress -c 100 <command>        # 100-run statistics
x time cmp 'cmd1' 'cmd2' 'cmd3'      # Compare commands

# Without x-cmd — use shell built-ins
time <command>                        # Basic timing
# For benchmarking, use a loop:
for i in $(seq 1 100); do
  start=$(date +%s%N)
  <command>
  end=$(date +%s%N)
  echo $(( end - start ))
done

What's Available

Command	Description
`x time <cmd>`	Single run, microsecond precision
`x time getms <cmd>`	Millisecond precision
`x time stress -c N <cmd>`	N runs with full stats
`x time stress -b N <cmd>`	Auto-decide runs within budget
`x time cmp 'c1' 'c2'`	Compare multiple commands

Output Formats

--csv CSV for programmatic analysis
--tsv Tab-separated
--yml YAML

This skill0 grows

Starting with the essentials. Will add:

Benchmarking patterns
Statistical interpretation guide
Common performance anti-patterns