python-docs-fr/library/timeit.po

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#: ../Doc/library/timeit.rst:2
msgid ":mod:`timeit` --- Measure execution time of small code snippets"
msgstr ""

#: ../Doc/library/timeit.rst:7
msgid "**Source code:** :source:`Lib/timeit.py`"
msgstr "**Code source :** :source:`Lib/timeit.py`"

#: ../Doc/library/timeit.rst:15
msgid ""
"This module provides a simple way to time small bits of Python code. It has "
"both a :ref:`timeit-command-line-interface` as well as a :ref:`callable "
"<python-interface>` one.  It avoids a number of common traps for measuring "
"execution times. See also Tim Peters' introduction to the \"Algorithms\" "
"chapter in the *Python Cookbook*, published by O'Reilly."
msgstr ""

#: ../Doc/library/timeit.rst:23
msgid "Basic Examples"
msgstr ""

#: ../Doc/library/timeit.rst:25
msgid ""
"The following example shows how the :ref:`timeit-command-line-interface` can "
"be used to compare three different expressions:"
msgstr ""

#: ../Doc/library/timeit.rst:37
msgid "This can be achieved from the :ref:`python-interface` with::"
msgstr ""

#: ../Doc/library/timeit.rst:48
msgid ""
"Note however that :mod:`timeit` will automatically determine the number of "
"repetitions only when the command-line interface is used.  In the :ref:"
"`timeit-examples` section you can find more advanced examples."
msgstr ""

#: ../Doc/library/timeit.rst:56
msgid "Python Interface"
msgstr ""

#: ../Doc/library/timeit.rst:58
msgid "The module defines three convenience functions and a public class:"
msgstr ""

#: ../Doc/library/timeit.rst:63
msgid ""
"Create a :class:`Timer` instance with the given statement, *setup* code and "
"*timer* function and run its :meth:`.timeit` method with *number* "
"executions. The optional *globals* argument specifies a namespace in which "
"to execute the code."
msgstr ""

#: ../Doc/library/timeit.rst:68 ../Doc/library/timeit.rst:79
#: ../Doc/library/timeit.rst:113
msgid "The optional *globals* parameter was added."
msgstr ""

#: ../Doc/library/timeit.rst:74
msgid ""
"Create a :class:`Timer` instance with the given statement, *setup* code and "
"*timer* function and run its :meth:`.repeat` method with the given *repeat* "
"count and *number* executions.  The optional *globals* argument specifies a "
"namespace in which to execute the code."
msgstr ""

#: ../Doc/library/timeit.rst:84
msgid "The default timer, which is always :func:`time.perf_counter`."
msgstr ""

#: ../Doc/library/timeit.rst:86
msgid ":func:`time.perf_counter` is now the default timer."
msgstr ""

#: ../Doc/library/timeit.rst:92
msgid "Class for timing execution speed of small code snippets."
msgstr ""

#: ../Doc/library/timeit.rst:94
msgid ""
"The constructor takes a statement to be timed, an additional statement used "
"for setup, and a timer function.  Both statements default to ``'pass'``; the "
"timer function is platform-dependent (see the module doc string). *stmt* and "
"*setup* may also contain multiple statements separated by ``;`` or newlines, "
"as long as they don't contain multi-line string literals.  The statement "
"will by default be executed within timeit's namespace; this behavior can be "
"controlled by passing a namespace to *globals*."
msgstr ""

#: ../Doc/library/timeit.rst:102
msgid ""
"To measure the execution time of the first statement, use the :meth:`."
"timeit` method.  The :meth:`.repeat` and :meth:`.autorange` methods are "
"convenience methods to call :meth:`.timeit` multiple times."
msgstr ""

#: ../Doc/library/timeit.rst:106
msgid ""
"The execution time of *setup* is excluded from the overall timed execution "
"run."
msgstr ""

#: ../Doc/library/timeit.rst:108
msgid ""
"The *stmt* and *setup* parameters can also take objects that are callable "
"without arguments.  This will embed calls to them in a timer function that "
"will then be executed by :meth:`.timeit`.  Note that the timing overhead is "
"a little larger in this case because of the extra function calls."
msgstr ""

#: ../Doc/library/timeit.rst:118
msgid ""
"Time *number* executions of the main statement.  This executes the setup "
"statement once, and then returns the time it takes to execute the main "
"statement a number of times, measured in seconds as a float. The argument is "
"the number of times through the loop, defaulting to one million.  The main "
"statement, the setup statement and the timer function to be used are passed "
"to the constructor."
msgstr ""

#: ../Doc/library/timeit.rst:127
msgid ""
"By default, :meth:`.timeit` temporarily turns off :term:`garbage collection` "
"during the timing.  The advantage of this approach is that it makes "
"independent timings more comparable.  This disadvantage is that GC may be an "
"important component of the performance of the function being measured.  If "
"so, GC can be re-enabled as the first statement in the *setup* string.  For "
"example::"
msgstr ""

#: ../Doc/library/timeit.rst:139
msgid "Automatically determine how many times to call :meth:`.timeit`."
msgstr ""

#: ../Doc/library/timeit.rst:141
msgid ""
"This is a convenience function that calls :meth:`.timeit` repeatedly so that "
"the total time >= 0.2 second, returning the eventual (number of loops, time "
"taken for that number of loops). It calls :meth:`.timeit` with *number* set "
"to successive powers of ten (10, 100, 1000, ...) up to a maximum of one "
"billion, until the time taken is at least 0.2 second, or the maximum is "
"reached."
msgstr ""

#: ../Doc/library/timeit.rst:148
msgid ""
"If *callback* is given and is not ``None``, it will be called after each "
"trial with two arguments: ``callback(number, time_taken)``."
msgstr ""

#: ../Doc/library/timeit.rst:156
msgid "Call :meth:`.timeit` a few times."
msgstr ""

#: ../Doc/library/timeit.rst:158
msgid ""
"This is a convenience function that calls the :meth:`.timeit` repeatedly, "
"returning a list of results.  The first argument specifies how many times to "
"call :meth:`.timeit`.  The second argument specifies the *number* argument "
"for :meth:`.timeit`."
msgstr ""

#: ../Doc/library/timeit.rst:165
msgid ""
"It's tempting to calculate mean and standard deviation from the result "
"vector and report these.  However, this is not very useful. In a typical "
"case, the lowest value gives a lower bound for how fast your machine can run "
"the given code snippet; higher values in the result vector are typically not "
"caused by variability in Python's speed, but by other processes interfering "
"with your timing accuracy. So the :func:`min` of the result is probably the "
"only number you should be interested in.  After that, you should look at the "
"entire vector and apply common sense rather than statistics."
msgstr ""

#: ../Doc/library/timeit.rst:178
msgid "Helper to print a traceback from the timed code."
msgstr ""

#: ../Doc/library/timeit.rst:180
msgid "Typical use::"
msgstr ""

#: ../Doc/library/timeit.rst:188
msgid ""
"The advantage over the standard traceback is that source lines in the "
"compiled template will be displayed.  The optional *file* argument directs "
"where the traceback is sent; it defaults to :data:`sys.stderr`."
msgstr ""

#: ../Doc/library/timeit.rst:196
msgid "Command-Line Interface"
msgstr ""

#: ../Doc/library/timeit.rst:198
msgid ""
"When called as a program from the command line, the following form is used::"
msgstr ""

#: ../Doc/library/timeit.rst:202
msgid "Where the following options are understood:"
msgstr ""

#: ../Doc/library/timeit.rst:208
msgid "how many times to execute 'statement'"
msgstr ""

#: ../Doc/library/timeit.rst:212
msgid "how many times to repeat the timer (default 3)"
msgstr ""

#: ../Doc/library/timeit.rst:216
msgid "statement to be executed once initially (default ``pass``)"
msgstr ""

#: ../Doc/library/timeit.rst:220
msgid ""
"measure process time, not wallclock time, using :func:`time.process_time` "
"instead of :func:`time.perf_counter`, which is the default"
msgstr ""

#: ../Doc/library/timeit.rst:227
msgid "use :func:`time.time` (deprecated)"
msgstr ""

#: ../Doc/library/timeit.rst:231
msgid "specify a time unit for timer output; can select usec, msec, or sec"
msgstr ""

#: ../Doc/library/timeit.rst:237
msgid "use :func:`time.clock` (deprecated)"
msgstr ""

#: ../Doc/library/timeit.rst:241
msgid "print raw timing results; repeat for more digits precision"
msgstr ""

#: ../Doc/library/timeit.rst:245
msgid "print a short usage message and exit"
msgstr ""

#: ../Doc/library/timeit.rst:247
msgid ""
"A multi-line statement may be given by specifying each line as a separate "
"statement argument; indented lines are possible by enclosing an argument in "
"quotes and using leading spaces.  Multiple :option:`-s` options are treated "
"similarly."
msgstr ""

#: ../Doc/library/timeit.rst:252
msgid ""
"If :option:`-n` is not given, a suitable number of loops is calculated by "
"trying successive powers of 10 until the total time is at least 0.2 seconds."
msgstr ""

#: ../Doc/library/timeit.rst:255
msgid ""
":func:`default_timer` measurements can be affected by other programs running "
"on the same machine, so the best thing to do when accurate timing is "
"necessary is to repeat the timing a few times and use the best time.  The :"
"option:`-r` option is good for this; the default of 3 repetitions is "
"probably enough in most cases.  You can use :func:`time.process_time` to "
"measure CPU time."
msgstr ""

#: ../Doc/library/timeit.rst:263
msgid ""
"There is a certain baseline overhead associated with executing a pass "
"statement. The code here doesn't try to hide it, but you should be aware of "
"it.  The baseline overhead can be measured by invoking the program without "
"arguments, and it might differ between Python versions."
msgstr ""

#: ../Doc/library/timeit.rst:272
msgid "Examples"
msgstr "Exemples"

#: ../Doc/library/timeit.rst:274
msgid ""
"It is possible to provide a setup statement that is executed only once at "
"the beginning:"
msgstr ""

#: ../Doc/library/timeit.rst:291
msgid "The same can be done using the :class:`Timer` class and its methods::"
msgstr ""

#: ../Doc/library/timeit.rst:301
msgid ""
"The following examples show how to time expressions that contain multiple "
"lines. Here we compare the cost of using :func:`hasattr` vs. :keyword:`try`/:"
"keyword:`except` to test for missing and present object attributes:"
msgstr ""

#: ../Doc/library/timeit.rst:347
msgid ""
"To give the :mod:`timeit` module access to functions you define, you can "
"pass a *setup* parameter which contains an import statement::"
msgstr ""

#: ../Doc/library/timeit.rst:358
msgid ""
"Another option is to pass :func:`globals` to the  *globals* parameter, which "
"will cause the code to be executed within your current global namespace.  "
"This can be more convenient than individually specifying imports::"
msgstr ""