hyperfine is a command-line benchmarking tool that runs your commands repeatedly, collects timing data across multiple runs, and gives you statistically reliable results with mean, min, max, and standard deviation, making it far more accurate than a one-shot time measurement.
You’ve been timing commands with time for years, and it’s been lying to you, not because time is broken, but because a single run captures one data point that can spike or dip based on cache state, CPU load, or kernel scheduling.