CHANGELOG.md

unreleased

Features

Changes

Bugfixes

Other

Packaging

v1.13.0

Features

• Added a new --shell=none/-N option to disable the intermediate shell for executing the benchmarked commands. Hyperfine normally measures and subtracts the shell spawning time, but the intermediate shell always introduces a certain level of measurement noise. Using --shell=none/-N allows users to benchmark very fast commands (with a runtime on the order of a few milliseconds). See #336, #429, and #487 (@cipriancraciun and @sharkdp)
• Added --setup/-s option that can be used to run make all or similar. It runs once per set of tests, like --cleanup/-c (@avar)
• Added new plot_progression.py script to debug background interference effects.

Changes

• Breaking change: the -s short option for --style is now used for the new --setup option.
• The environment offset randomization is now also available on Windows, see #484

Other

• Improved documentation and test coverage, cleaned up code base for future improvements.

v1.12.0

Features

• --command-name can now take parameter names from --parameter-* options, see #351 and #391 (@silathdiir)
• Exit codes (or signals) are now printed in cases of command failures, see #342 (@KaindlJulian)
• Exit codes are now part of the JSON output, see #371 (@JordiChauzi)
• Colorized output should now be enabled on Windows by default, see #427

Changes

• When --export-* commands are used, result files are created before benchmark execution to fail early in case of, e.g., wrong permissions. See #306 (@s1ck).
• When --export-* options are used, result files are written after each individual benchmark command instead of writing after all benchmarks have finished. See #306 (@s1ck).
• Reduce number of shell startup time measurements from 200 to 50, generally speeding up benchmarks. See #378
• User and system time are now in consistent time units, see #408 and #409 (@film42)

v1.11.0

Features

• The -L/--parameter-list option can now be specified multiple times to evaluate all possible combinations of the listed parameters:

  hyperfine -L number 1,2 -L letter a,b,c \
      "echo {number}{letter}" \
      "printf '%s\n' {number}{letter}"
  # runs 12 benchmarks: 2 commands (echo and printf) times 6 combinations of
  # the "letter" and "number" parameters

  See: #253, #318 (@wchargin)

• Add CLI option to identify a command with a custom name, see #326 (@scampi)

Changes

• When parameters are used with --parameter-list or --parameter-scan, the JSON export format now contains a dictionary parameters instead of a single key parameter. See #253, #318.
• The plot_parametrized.py script now infers the parameter name, and its --parameter-name argument has been deprecated. See #253, #318.

Bugfixes

• Fix a bug in the outlier detection which would only detect "slow outliers" but not the fast ones (runs that are much faster than the rest of the benchmarking runs), see #329
• Better error messages for very fast commands that would lead to inf/nan results in the relative speed comparison, see #319
• Show error message if --warmup or --*runs arguments can not be parsed, see #337
• Keep output colorized when the output is not interactive and --style=full or --style=color is used.

v1.10.0

Features

• Hyperfine now comes with shell completion files for Bash, Zsh, Fish and PowerShell, see #290 (@four0000four).
• Hyperfine now comes with a basic man page, see #257 (@cadeef)
• 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.
• A few enhancements for the histogram plotting scripts and the advanced statistics script
• Updates for the plot_whisker.py script, see #275 (@ghaiklor)

Bugfixes

• Fix Spin Icon on Windows, see #229
• A few typos have been fixed, see #292 (@McMartin)

Packaging

• hyperfine is now available on MacPorts for macOS, see #281 (@herbygillot)
• hyperfine is now available on OpenBSD, see #289 (@minusf)

Package authors: note that Hyperfine now comes with a set of shell completion files and a man page (see above)

v1.9.0

Features

• The new --parameter-list <VAR> <VALUES> option can be used to run a parametrized benchmark on a user-specified list of values. This is similar to --parameter-scan <VAR> <MIN> <MAX>, but doesn't necessarily required numeric arguments.

  hyperfine --parameter-list compiler "gcc,clang" \
      "{compiler} -O2 main.cpp"

  See: #227, #234 (@JuanPotato)

• Added none as a possible choice for the --style option to run hyperfine without any output, see #193 (@knidarkness)

• Added a few new scripts for plotting various types of benchmark results (https://github.com/sharkdp/hyperfine/tree/master/scripts)

Changes

• The --prepare command is now also run during the warmup phase, see #182 (@sseemayer)

• Better estimation of the remaining benchmark time due to an update of the indicatif crate.

Other

• hyperfine is now available on NixOS, see #240 (@tuxinaut)

v1.8.0

Features

• The --prepare <CMD> option can now be specified multiple times to run specific preparation commands for each of the benchmarked programs:

  hyperfine --prepare "make clean; git checkout master"  "make" \
            --prepare "make clean; git checkout feature" "make"

  See: #216, #218 (@iamsauravsharma)

• Added a new 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 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 sleep 0.3, sleep 0.5 and sleep 0.7:

  hyperfine --parameter-scan delay 0.3 0.7 -D 0.2 'sleep {delay}'

  For more details, see #184 (@piyushrungta25)

Other

• 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 hyperfines output (@tcmal)
• Added two Python scripts to post-process exported benchmark results (see 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)

Other

• Binary releases for Windows are now available, see #87

v1.2.0

• Support parameters in preparation commands, see #68 (@siiptuo)
• Updated dependencies, see #69. The minimum required Rust version is now 1.24.

v1.1.0

• Added --show-output option (@chrisduerr and @sevagh)
• Refactoring work (@stevepentland)

v1.0.0

Features

• Support for various export-formats like CSV, JSON and Markdown - see #38, #44, #49, #42 (@stevepentland)
• Summary output that compares the different benchmarks, see #6 (@stevepentland)
• Parameterized benchmarks via -P, --parameter-scan <VAR> <MIN> <MAX>, see #19

Thanks

I'd like to say a big THANK YOU to @stevepentland for implementing new features, for reviewing pull requests and for giving very valuable feedback.

v0.5.0

• Proper Windows support (@stevepentland)
• Added --style auto/basic/nocolor/full option (@stevepentland)
• Correctly estimate the full execution time, see #27 (@rleungx)
• Added Void Linux install instructions (@wpbirney)

v0.4.0

• New --style option to disable output coloring and interactive CLI features, see #24 (@stevepentland)
• Statistical outlier detection, see #23 #18

v0.3.0

Features

• In addition to 'real' (wall clock) time, Hyperfine can now also measure 'user' and 'system' time (see #5).
• Added --prepare option that can be used to clear up disk caches before timing runs, for example (see #8).

Other

• Arch Linux package for Hyperfine (@jD91mZM2).
• Ubuntu/Debian packages are now are available.

v0.2.0

Initial public release