Hi all, I was long puzzled why devstack is installing numpy. Being a fantastic package itself, it has the drawback of taking about 4 minutes to compile its C extensions when installing on our gates (e.g. [0]). I finally took time to research and here is what I've found:
it is used only by websockify package (installed by AFAIK ironic and nova only), and there it is used to speed up the HyBi protocol. Although the code itself has a path to work without numpy installed [1], the setup.py of websockify declares numpy as a hard dependency [2]. My question is do we really need those speedups? Do we test any feature requiring fast HyBi support on gates? Not installing numpy would shave 4 minutes off any gate job that is installing Nova or Ironic, which seems like a good deal to me. If we decide to save this time, I have prepared a pull request for websockify that moves numpy requirement to "extras" [3]. As a consequence numpy will not be installed by default as dependency, but still possible to install with e.g. "pip install websockify[fastHyBi]", and package builders can also specify numpy as hard dependency for websockify package in package specs. What do you think? [0] http://logs.openstack.org/82/236982/6/check/gate-tempest-dsvm-ironic-agent_ssh/1141960/logs/devstacklog.txt.gz#_2015-11-11_19_51_40_784 [1] https://github.com/kanaka/websockify/blob/master/websockify/websocket.py#L143 [2] https://github.com/kanaka/websockify/blob/master/setup.py#L37 [3] https://github.com/pshchelo/websockify/commit/0b1655e73ea13b4fba9c6fb4122adb1435d5ce1a Best regards, -- Dr. Pavlo Shchelokovskyy Senior Software Engineer Mirantis Inc www.mirantis.com
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