[issue31415] Add -X option to show import time

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

If this proposition be accepted I would want to see not only cumulated times, but also pure times, without time of nested imports.

I guess this feature doesn't work correctly with threading.

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nosy: +serhiy.storchaka

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue31415>
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