• Multiple Python versions are handled correctly (#1444)
• JSONC fixes (#1426)

• New documentation design

• ASV supports using JSONC as a configuration file (#1420)

• Update deprecation for latest conda versions (#1403)
• Fix runs for profiles commit results (#1404)
• Internal pip parser now works for git URLs with branches and tags (#1431)

• asv defaults to --force-reinstall now to facilitate compare and continuous for manually versioned projects (#1421)

• build is now the default backend for asv to install projects. (#1387)

• Partially skipped benchmarks will still have their results displayed. (#1351)
• asv will now correctly prepare all the build backend dependencies into base_requirements and the default build_command has been modified to allow fetching from PyPI. (#1377)

• The asv package no longer prepends the script execution directory unconditionally. Now we check for and remove the path only if it matches the directory that the runner script resides in. (#1346)
• The bdist wheels no longer include benchmarks and test. (#1349)
• The mamba plugin works correctly for newer versions (>=1.5) of libmambapy (#1372)
• The mamba plugin respects the MAMBARC environment if set, taking channels and channel priority from the file in the environment variable. (#1373)
• Fixed a bug where matrix requirements were dropped if an environment file was specified. (#1373)
• conda-forge is no longer a default channel for mamba. (#1373)

• asv now depends on virtualenv (#1379)

• pip dependencies in environment.yml files for the mamba plugin are handled correctly (#1326)
• asv.config.json matrix requirements no longer need pip+ set explicitly for calling the pip solver for virtualenv
• asv will now use conda_environment_file if it exists (#1325)

• asv timestamps via datetime are now Python 3.12 compatible (#1331)
• asv now provides asv[virtualenv] as an installable target
• asv now uses Github Actions exclusively for Windows and Linux

• asv_runner is now used internally, making the addition of custom benchmark types viable (#1287)
• Benchmarks can be skipped, both wholly and in part using new decorators skip_benchmark_if and skip_params_if (#1309)
• Benchmarks can be skipped during their execution (after setup) by raising SkipNotImplemented (#1307)
• Added default_benchmark_timeout to the configuration object, can also be passed via -a timeout=NUMBER (#1308)
• ASV_RUNNER_PATH can be set from the terminal to test newer versions of asv_runner (#1312)

• Removed asv dev in favor of using asv run with the right arguments (#1200)
• asv run and asv continuous don't implement the --strict option anymore, and they will always return a non-zero (i.e. 2) exit status if any benchmark fail.

• Fixed install_timeout for conda (#1310)
• Fixed handling of local pip matrix (#1312)
• Fixed the deadlock when mamba is used with an environment file. (#1300)
• Fixed environment file usage with mamba and recognizes default environment.yml. (#1303)

• mamba and conda use environment.yml if it exists
• virtualenv now requires packaging due to distutils deprecations (#1240)
• Wheels are now built for CPython 3.8, 3.9, 3.10, 3.11

• Packaging requirements-dev.txt file, used in setup.py. (#1013)

• Adding environment variables to build and benchmark commands. (#809, #833)
• Added --strict option to asv run to set exit code on failure. (#865)
• Added --no-stats option to asv compare and asv continuous. (#879)
• Added --durations option to asv run and asv show for displaying benchmark run durations. (#838)
• Added --date-period option to asv run for running benchmarks for commits separated by a constant time interval. (#835)
• Web UI button to group regressions by benchmark. (#869)
• Space-saving v2 file format for storing results. (#847)
• timeraw_* benchmarks for measuring e.g. import times. (#832)
• Support for using conda environment files for env setup. (#793)

• Results file format change requires asv update to update old data to v2 format.
• The configuration syntax for "matrix", "exclude", and "include" in asv.conf.json has changed. The old syntax is still supported, unless you are installing packages named req, env, env_nobuild.

• When an asv find step fails due to timeout, assume runtime equal to timeout to allow bisection to proceed (#768)
• Minor fixes and improvements (#897, #896, #888, #881, #877, #876, #875, #861, #870, #868, #867, #866, #864, #863, #857, #786, #854, #855, #852, #850, #844, #843, #842, #839, #841, #840, #837, #836, #834, #831, #830, #829, #828, #826, #825, #824)

• Uniqueness of repr() for param objects is now guaranteed by suffixing unique identifier corresponding to order of appearance. (#771)
• Memory addresses are now stripped from the repr() of param elements, allowing comparison across multiple runs. (#771)
• asv dev is now equivalent to asv run with --python=same default. (#874)
• asv continuous by default now records measurement samples, for better comparison statistics. (#878)
• ASV now uses PEP 518 pyproject.toml in packaging. (#853)

• Change wheel installation default command to chdir away from build directory instead of --force-install. (#823)

• asv check command for a quick check of benchmark suite validity. (#782)
• asv run HASHFILE:filename can read commit hashes to run from file or stdin (#768)
• --set-commit-hash option to asv run, which allows recording results from runs in "existing" environments not managed by asv (#794)
• --cpu-affinity option to asv run and others, to set CPU affinity (#769)
• "Hide legend" option in web UI (#807)
• pretty_source benchmark attribute for customizing source code shown (#810)
• Record number of cores in machine information (#761)

• Default timer changed from process_time() to timeit.default_timer() to fix resolution issues on Windows. The old behavior can be restored by setting Benchmark.timer = time.process_time (#780)

• Fix pip command line in install_command (#806)
• Python 3.8 compatibility (#814)
• Minor fixes and improvements (#759, #764, #767, #772, #779, #783, #784, #787, #790, #795, #799, #804, #812, #813, #815, #816, #817, #818, #820)

• In case of significant changes asv continuous message now reports if performance decreased or increased.

Minor bugfixes and improvements.

• Use measured uncertainties to weigh step detection. (#753)
• Detect also single-commit regressions, if significant. (#745)
• Use proper two-sample test when raw results available. (#754)
• Use a better regression "badness" measure. (#744)
• Display verbose command output immediately, not when command completes. (#747)
• Fix handling of benchmark suite import failures in forkserver and benchmark discovery. (#743, #742)
• Fix forkserver child process handling.
• In asv test suite, use dummy conda packages. (#738)
• Other minor fixes (#756, #750, #749, #746)

Major release with several new features.

• Revised timing benchmarking. asv will display and record the median and interquartile ranges of timing measurement results. The information is also used by asv compare and asv continuous in determining what changes are significant. The asv run command has new options for collecting samples. Timing benchmarks have new benchmarking parameters for controlling how timing works, including processes attribute for collect data by running benchmarks in different sequential processes. The defaults are adjusted to obtain faster benchmarking. (#707, #698, #695, #689, #683, #665, #652, #575, #503, #493)
• Interleaved benchmark running. Timing benchmarks can be run in interleaved order via asv run --interleave-processes, to obtain better sampling over long-time background performance variations. (#697, #694, #647)
• Customization of build/install/uninstall commands. (#699)
• Launching benchmarks via a fork server (on Unix-based systems). Reduces the import time overheads in launching new benchmarks. Default on Linux. (#666, #709, #730)
• Benchmark versioning. Invalidate old benchmark results when benchmarks change, via a benchmark version attribute. User-configurable, by default based on source code. (#509)
• Setting benchmark attributes on command line, via --attribute. (#647)
• asv show command for displaying results on command line. (#711)
• Support for Conda channels. (#539)
• Provide ASV-specific environment variables to launched commands. (#624)
• Show branch/tag names in addition to commit hashes. (#705)
• Support for projects in repository subdirectories. (#611)
• Way to run specific parametrized benchmarks. (#593)
• Group benchmarks in the web benchmark grid (#557)
• Make the web interface URL addresses more copypasteable. (#608, #605, #580)
• Allow customizing benchmark display names (#484)
• Don't reinstall project if it is already installed (#708)

• The goal_time attribute in timing benchmarks is removed (and now ignored). See documentation on how to tune timing benchmarks now.
• asv publish may ask you to run asv update once after upgrading, to regenerate benchmarks.json if asv run was not yet run.
• If you are using asv plugins, check their compatibility. The internal APIs in asv are not guaranteed to be backward compatible.

• Fixes in 0.2.1 and 0.2.2 are also included in 0.3.
• Make asv compare accept named commits (#704)
• Fix asv profile --python=same (#702)
• Make asv compare behave correctly with multiple machines/envs (#687)
• Avoid making too long result file names (#675)
• Fix saving profile data (#680)
• Ignore missing branches during benchmark discovery (#674)
• Perform benchmark discovery only when necessary (#568)
• Fix benchmark skipping to operate on a per-environment basis (#603)
• Allow putting asv.conf.json to benchmark suite directory (#717)
• Miscellaneous minor fixes (#735, #734, #733, #729, #728, #727, #726, #723, #721, #719, #718, #716, #715, #714, #713, #706, #701, #691, #688, #684, #682, #660, #634, #615, #600, #573, #556)

• www: display regressions separately, one per commit (#720)
• Internal changes. (#712, #700, #681, #663, #662, #637, #613, #606, #572)
• CI/etc changes. (#585, #570)
• Added internal debugging command asv.benchmarks (#685)
• Make tests not require network connection, except with Conda (#696)
• Drop support for end-of-lifed Python versions 2.6 & 3.2 & 3.3 (#548)

Prerelease. Same as 0.3rc1, minus #721--

Bugfix release with minor feature additions.

• Add a --no-pull option to asv publish and asv run (#592)
• Add a --rewrite option to asv gh-pages and fix bugs (#578, #529)
• Add a --html-dir option to asv publish (#545)
• Add a --yes option to asv machine (#540)
• Enable running via python -masv (#538)

• Fix support for mercurial >= 4.5 (#643)
• Fix detection of git subrepositories (#642)
• Find conda executable in the "official" way (#646)
• Hide tracebacks in testing functions (#601)
• Launch virtualenv in a more sensible way (#555)
• Disable user site directory also when using conda (#553)
• Set PIP_USER to false when running an executable (#524)
• Set PATH for commands launched inside environments (#541)
• os.environ can only contain bytes on Win/py2 (#528)
• Fix hglib encoding issues on Python 3 (#508)
• Set GIT_CEILING_DIRECTORIES for Git (#636)
• Run pip via python -mpip to avoid shebang limits (#569)
• Always use https URLs (#583)
• Add a min-height on graphs to avoid a flot traceback (#596)
• Escape label html text in plot legends (#614)
• Disable pip build isolation in wheel_cache (#670)
• Fixup CI, test, etc issues (#616, #552, #601, #586, #554, #549, #571, #527, #560, #565)

Same as 0.2.2, minus #670.

• Use process groups on Windows (#489)
• Sanitize html filenames (#498)
• Fix incorrect date formatting + default sort order in web ui (#504)

• Automatic detection and listing of performance regressions. (#236)
• Support for Windows. (#282)
• New setup_cache method. (#277)
• Exclude/include rules in configuration matrix. (#329)
• Command-line option for selecting environments. (#352)
• Possibility to include packages via pip in conda environments. (#373)
• The pretty_name attribute can be used to change the display name of benchmarks. (#425)
• Git submodules are supported. (#426)
• The time when benchmarks were run is tracked. (#428)
• New summary web page showing a list of benchmarks. (#437)
• Atom feed for regressions. (#447)
• PyPy support. (#452)

• The parent directory of the benchmark suite is no longer inserted into sys.path. (#307)
• Repository mirrors are no longer created for local repositories. (#314)
• In asv.conf.json matrix, null previously meant (undocumented) the latest version. Now it means that the package is to not be installed. (#329)
• Previously, the setup and teardown methods were run only once even when the benchmark method was run multiple times, for example due to repeat > 1 being present in timing benchmarks. This is now changed so that also they are run multiple times. (#316)
• The default branch for Mercurial is now default, not tip. (#394)
• Benchmark results are now by default ordered by commit, not by date. (#429)
• When asv run and other commands are called without specifying revisions, the default values are taken from the branches in asv.conf.json. (#430)
• The default value for --factor in asv continuous and asv compare was changed from 2.0 to 1.1 (#469).

• Output will display on non-Unicode consoles. (#313, #318, #336)
• Longer default install timeout. (#342)
• Many other bugfixes and minor improvements.

Same as 0.2.

First full release.

• Display version correctly in docs.
• Include pip_requirements.txt.

No significant changes.

No significant changes.