Hi Peter, Thank you for your bug report. The bug is a recent regression in the perf module. I just fixed it with the newly released perf 0.9.3. http://perf.readthedocs.io/en/latest/changelog.html#version-0-9-3-2017-01-16
I also released performance 0.5.1 which now uses perf 0.9.3. By the way, I fixed perf and performance unit tests on Windows. Changes: * Fix Windows support (upgrade perf from 0.9.0 to 0.9.3) * Upgrade requirements: - Chameleon: 2.25 => 3.0 - Django: 1.10.3 => 1.10.5 - docutils: 0.12 => 0.13.1 - dulwich: 0.15.0 => 0.16.3 - mercurial: 4.0.0 => 4.0.2 - perf: 0.9.0 => 0.9.3 - psutil: 5.0.0 => 5.0.1 Victor _______________________________________________ Speed mailing list Speed@python.org https://mail.python.org/mailman/listinfo/speed