Package: ipython Version: 5.1.0-3 Severity: important Tags: upstream Dear Maintainer,
Stretch is shipping with ipython 5, which has a major performance regression compared to previous versions. (not yet fixed in ipython 6) Startup time has increased from about 1 second (already slow, but tolerable) to at least 2.5 seconds (my own), and possibly 10 seconds (some reports). As a workaround, users can use: neverrunpipasroot@host$ python2 -m pip install --user 'IPython==4.*' neverrunpipasroot@host$ python3 -m pip install --user 'IPython==4.*' The upstream issue is https://github.com/ipython/ipython/issues/9908 (The actual issue lies somewhere in pygments, which is a new dependency). -Ben -- System Information: Debian Release: 9.0 APT prefers unstable-debug APT policy: (500, 'unstable-debug'), (500, 'unstable'), (1, 'experimental') Architecture: amd64 (x86_64) Foreign Architectures: i386, x32, arm64 Kernel: Linux 4.9.0-2-amd64 (SMP w/4 CPU cores) Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Init: systemd (via /run/systemd/system) Versions of packages ipython depends on: ii python-ipython 5.1.0-3 ipython recommends no packages. ipython suggests no packages. -- no debconf information
