- Add support for minutes and hours in `--time-unit`, as well as short and plural aliases such as `ms`, `seconds`, and `min`, see #960 (@sharkdp)
- Expose `$HYPERFINE_ITERATION` to `--prepare` and `--conclude` commands, see #781 and #807 (@willcl-ark)
- Show elapsed time during the initial benchmark run, see #416 and #581 (@devonhollowood)
- Add colors to `--help` output, see #841 (@starsep)
## Changes
- Format times in CSV exports with six decimal places, see #966 and #972 (@sharkdp)
- Update dependencies and raise the minimum supported Rust version to 1.97, see #934 (@sharkdp)
## Bugfixes
- Reject zero values for `--runs`, `--min-runs`, and `--max-runs` instead of allowing invalid run counts, see #923 (@VXNCXNX, @sharkdp)
- Reject negative parameter-scan steps before expanding ranges, avoiding hangs and excessive memory use, see #951 (@Likio3000)
- Preserve existing export files when command options are invalid, see #950 (@Likio3000)
- Truncate export files when rewriting results to avoid leaving trailing bytes, see #970 (@sharkdp)
- Preserve backticks in command names in Markdown exports, see #947 (@Likio3000)
- Handle broken output pipes gracefully instead of panicking, see #932 (@Mathjk)
- Collect peak memory usage separately for each command on Unix, so commands no longer inherit the peak memory usage of earlier commands, see #965 (@sharkdp)
- Preserve 100-nanosecond precision in Windows CPU times, see #964 (@sharkdp)
- Python scripts: Correct the interpretation of Welch's t-test results, see #943 (@sharkdp)
## Other
- Build binaries for Windows ARM64 and Linux ARM64 musl, see #922 and #924 (@meop)
- Refactor measurement, statistics, and formatting code to use typed quantities, see #954, #958, #961, #967, #969, #971, and #976 (@sharkdp)
- Improve documentation and examples, including comparisons across Git branches, iteration variables, reference commands, and selective failure handling, see #899, #900, #929, and #940 (@xfocus3, @ded-furby, @Likio3000, @sharkdp)
- Add a new `--reference <cmd>` option to specify a reference command for the relative speed comparison, see #579, #577 and #744 (@sharkdp)
- Add `--conclude` argument (analog to `--prepare`), see #565 and #719 (@jackoconnordev)
- Allow `--output=…` to appear once for each command, enabling use cases like `hyperfine --output=null my-cmd --output=./file.log my-cmd`, see #529 and #775 (@sharkdp)
- The environment variable `$HYPERFINE_ITERATION` will now contain the current iteration number for each benchmarked command, see #775 (@sharkdp)
- Add iteration information to failure error message, see #771 and #772 (@sharkdp)
- Python scripts:
- legend modification parameters and output DPI, see #758 (@Spreadcat)
- During execution of benchmarks, hyperfine will now set a `HYPERFINE_RANDOMIZED_ENVIRONMENT_OFFSET` environment variable in order to randomize the memory layout. See #235 and #241 for references and details.
- Added a new [`welch_ttest.py`](https://github.com/sharkdp/hyperfine/blob/master/scripts/welch_ttest.py) script to test whether or not the two benchmark
results are the same, see #222 (@uetchy)
- The Markdown export has been improved. The relative speed is now exported
with a higher precision (see #208) and includes the standard deviation
(see #225).
## Other
- Improved documentation for [`scripts`](https://github.com/sharkdp/hyperfine/tree/master/scripts) folder (@matthieusb)
# v1.7.0
## Features
- Added a new `-D`,`--parameter-step-size` option that can be used to control
the step size for `--parameter-scan` benchmarks. In addition, decimal numbers
are now allowed for parameter scans. For example, the following command runs
- hyperfine is now in the official Alpine repositories, see #177 (@maxice8, @5paceToast)
- hyperfine is now in the official Fedora repositories, see #196 (@ignatenkobrain)
- hyperfine is now in the official Arch Linux repositories
- hyperfine can be installed on FreeBSD, see #204 (@0mp)
- Enabled LTO for slightly smaller binary sizes, see #179 (@Calinou)
- Various small improvements all over the code base, see #194 (@phimuemue)
# v1.6.0
## Features
- Added a `-c, --cleanup <CMD>` option to execute `CMD` after the completion of all benchmarking runs for a given command. This is useful if the commands to be benchmarked produce artifacts that need to be cleaned up. See #91 (@RalfJung and @colinwahl)
- Add parameter values (for `--parameter-scan` benchmarks) to exported CSV and JSON files. See #131 (@bbannier)
- Added AsciiDoc export option, see #137 (@5paceToast)
- The relative speed is now part of the Markdown export, see #127 (@mathiasrw and @sharkdp).
- The *median* run time is now exported via CSV and JSON, see #171 (@hosewiejacke and @sharkdp).
## Other
- Hyperfine has been updated to Rust 2018 (@AnderEnder). The minimum supported Rust version is now 1.31.
# v1.5.0
## Features
- Show the number of runs in `hyperfine`s output (@tcmal)
- Added two Python scripts to post-process exported benchmark results (see [`scripts/`](https://github.com/sharkdp/hyperfine/tree/master/scripts) folder)
## Other
- Refined `--help` text for the `--export-*` flags (@psteinb)
- Added Snapcraft file (@popey)
- Small improvements in the progress bar "experience".
# v1.4.0
## Features
- Added `-S`/`--shell` option to override the default shell, see #61 (@mqudsi and @jasonpeacock)
- Added `-u`/`--time-unit` option to change the unit of time (`second` or `millisecond`), see #80 (@jasonpeacock)
- Markdown export auto-selects time unit, see #71 (@jasonpeacock)
# v1.3.0
## Feature
- Compute and print standard deviation of the speed ratio, see #83 (@Shnatsel)
- More compact output format, see #70 (@jasonpeacock)
- Added `--style=color`, see #70 (@jasonpeacock)
- Added options to specify the max/exact numbers of runs, see #77 (@orium)
## Bugfixes
- Change Windows `cmd` interpreter to `cmd.exe` to prevent accidentally calling other programs, see #74 (@tathanhdinh)
