Hi,

I released perf 0.7.11. News since perf 0.7.3:

• Support PyPy
• Add units to samples: second, byte, integer. Benchmarks on the memory usage (track memory) are now displayed correctly.
• Remove environment variables: add --inherit-environ cmdline option.
• Add more metadata: mem_max_rss, python_hash_seed (PYTHONHASHSEED env var). Enhance cpu_conifig: add nohz_full & isolated. Enhance python_version: add Mercurial revision.
• Better and more reliable code to calibrate benchmarks, calibration samples are now stored (in warmup samples).
• Bugfixes as usual.

perf changelog:

Version 0.7.11 (2016-09-19)

• Fix metadata when NOHZ is not used: when /sys/devices/system/cpu/nohz_full contains ' (null)\n'

Version 0.7.10 (2016-09-17)

• Fix metadata when there is no isolated CPU
• Fix collecting metadata when /sys/devices/system/cpu/nohz_full doesn't exist

Version 0.7.9 (2016-09-17)

• Add :meth:Benchmark.get_unit method
• Add :meth:BenchmarkSuite.get_metadata method
• metadata: add nohz_full and isolated to cpu_config
• add --affinity option to the metadata command
• convert: fix --remove-all-metadata, keep the unit
• metadata: fix regex to get the Mercurial revision for python_version, support also locally modified source code (revision ending with "+")

Version 0.7.8 (2016-09-10)

• Worker child processes are now run in a fresh environment: environment variables are removed, to enhance reproductability.
• Add --inherit-environ command line argument.
• metadata: add python_cflags, fix python_version for PyPy and add also the Mercurial version into python_version (if available)

Version 0.7.7 (2016-09-07)

• Reintroduce TextRunner._spawn_worker_suite() as a temporary workaround to fix the pybench benchmark of the performance module.

Version 0.7.6 (2016-09-02)

Tracking memory usage now works correctly on Linux and Windows. The calibration is now done in a the first worker process.

• --tracemalloc and --track-memory now use the memory peak as the unique sample for the run.
• Rewrite code to track memory usage on Windows. Add mem_peak_pagefile_usage metadata. The win32api module is no more needed, the code now uses the ctypes module.
• convert: add --remove-all-metadata and --update-metadata commands
• Add unit metadata: byte, integer or second.
• Run samples can now be integer (not only float).
• Don't round samples to 1 nanosecond anymore: with a large number of loops (ex: 2^24), rounding reduces the accuracy.
• The benchmark calibration is now done by the first worker process

Version 0.7.5 (2016-09-01)

• Add Benchmark.update_metadata() method
• Warmup samples can now be zero. TextRunner now raises an error if a sample function returns zero for a sample, except of calibration and warmup samples.

Version 0.7.4 (2016-08-18)

• Support PyPy
• metadata: add mem_max_rss and python_hash_seed
• Add :func:perf.python_implementation and :func:perf.python_has_jit functions
• In workers, calibration samples are now stored as warmup samples.
• With a JIT (PyPy), the calibration is now done in each worker. The warmup step can compute more warmup samples if a raw sample is shorter than the minimum time.
• Warmups of Run objects are now lists of (loops, raw_sample) rather than lists of samples. This change requires a change in the JSON format.

Victor