Time-stamp lines emitted to user_log.

What’s the problem this feature will solve? Enable post-facto analysis of pip operation running time.

Describe the solution you’d like Prefix each line in the user_log (a.k.a. --log) with its timestamp.

Example use-case: pip user notes installation of a package takes a long time to complete; by inspecting the log they can see which sub-phase(s) of pip install took the lion’s share of the time.

Alternative Solutions Pip can be wrapped with a script that logs start/end time, and/or prefixes every line of output from pip with a timestamp. Biggest drawback is incompatibility with e.g. python -m pip-based invocations.

Additional context I’ll be sending a PR with an implementation proposal shortly (creating this issue first for to make a news/ entry).

[pradyunsg]

I don’t think this should be in pip’s output by default. I’m okay with providing this functionality behind a flag.

[cjerdonek]

@fischman You can disregard my previous message.