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Document time

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This is a bit barebones, but `time` isn't super complicated to use and
it should explain the basics.

Fixes #6442

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Fabian Homborg 2020-01-05 14:50:54 +01:00
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sphinx_doc_src/cmds/time.rst Normal file
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.. _cmd-time:
time - measure how long a command or block takes
================================================
Synopsis
--------
::
time COMMAND
Description
-----------
``time`` causes fish to measure how long a command takes and print the results afterwards. The command can be a simple fish command or a block. The results can not currently be redirected.
For checking timing after a command has completed, check :ref:`$CMD_DURATION <variables-special>`.
Example
-------
(for obvious reasons exact results will vary on your system)
::
>_ time sleep 1s
________________________________________________________
Executed in 1,01 secs fish external
usr time 2,32 millis 0,00 micros 2,32 millis
sys time 0,88 millis 877,00 micros 0,00 millis
>_ time for i in 1 2 3; sleep 1s; end
________________________________________________________
Executed in 3,01 secs fish external
usr time 9,16 millis 2,94 millis 6,23 millis
sys time 0,23 millis 0,00 millis 0,23 millis