v4.0.0

What's New

• Added support for CPython 3.14.

• Dropped support for CPython 3.8.

• The MOJO binary output format is now the default. The augmented collapsed stack format is no longer supported.

• The --sleepless/-s option has been replaced with the --cpu/-c option.

• Removed the heap option.

• Improved accuracy and performance by more than doubling the maximum attainable sampling rate.

• Added support for the exec system call.

Bugfixes

• Fixed a bug that caused Austin to fail to attach to a MacOS process for a second time with CPython 3.13.

• Fixed a bug that caused the sampling to halt if Austin failed to retrieve valid thread information.

v3.7.0

What's New

• Added support for CPython 3.13.

• Improve support for Python processes running in containers.

• Removed the exclude-empty option.

Bugfixes

• Fixed a bug with the MOJO binary format that caused the line end position to wrongly be set to a non-zero value for CPython < 3.11, where line end information is not actually available.

New Contributors

• @somepeoplecallmedisa made their first contribution in #223
• @jankatins made their first contribution in #226

v3.6.0

What's New

• Support for CPython 3.12

• Support for sub-interpreters.

• Dropped support for CPython 2, 3.3, 3.4, 3.5, 3.6 and 3.7.

• Improved interpreter detection and general stability on all supported platforms.

Bugfixes

• Ensure that threads are resumed by austinp when an error occurs during the sampling process.

• Propagate the termination signal to the child process when launching a command with Austin to prevent it from running indefinitely in the background.

v3.5.0

What's New

• Added support for fine-grained, column-level location information when exporting samples in binary mode.

• Improved multiprocess support.

• Dropped the alternative output format.

• Improved interpreter detection on all supported platforms.

v3.4.1

Bugfixes

• Fixed a bug with the MOJO binary format.

v3.4.0

What's New

• Added support for Python 3.11.

• Added the more efficient MOJO binary output format via the -b/--binary option. See the Wiki for more details on the MOJO format.

• Allowed disabling logging by setting the environment variable AUSTIN_NO_LOGGING.

• Improved permission error reporting on MacOS.

• Improved MacOS support.

• Improved austinp support on fork.

• Small performance improvements.

• Renamed the austinp binary installed from the Snap Store from austin.austinp to austin.p.

Bugfixes

• Fixed a bug in austinp that could have caused the interpreter to stall on launch.

• Fixed a bug in austinp that could have caused segmentation faults.

• Fixed a regression in austinp that caused most of the samples to be wrongly reported as idle

New Contributors

• @Mortal made their first contribution in #121

v3.3.0

What's New

• Added the new -w\--where option to get the current frame stack from a running Python process

• Substantial performance and accuracy improvements.

• The heap allocation has been turned off by default.

• Added support for profiling child processes that might have a different Python runtime version than the parent process.

• General platform support improvements.

Bugfixes

• Fixed heap size handling.

• Fixed a potential segmentation fault issue in the austinp variant.

• Fixed a potential deadlock scenario in austinp.

• Fixed support for the py.exe launcher on Windows.

v3.3.0-rc1

Release v3.3.0-rc1

v3.3.0-dev2

Release v3.3.0-dev2

v3.3.0-dev1

Release v3.3.0-dev1