lispdoc - results for time

(time form)	Function: Execute FORM and print timing information on TRACE-OUTPUT. On some hardware platforms estimated processor cycle counts are included in this output; this number is slightly inflated, since it includes the pipeline involved in reading the cycle counter -- executing (TIME NIL) a few times will give you an idea of the overhead, and its variance. The cycle counters are also per processor, not per thread: if multiple threads are running on the same processor, the reported counts will include cycles taken up by all threads running on the processor where TIME was executed. Furthermore, if the operating system migrates the thread to another processor between reads of the cycle counter, the results will be completely bogus. Finally, the counter is cycle counter, incremented by the hardware even when the process is halted -- which is to say that cycles pass normally during operations like SLEEP.
Example: (defun test-rotation () (setf debug-tk nil) (time (dotimes (i 100) (rotate))) (finish-output))	Mentioned in: CLtL2 - 25.3. Debugging Tools HyperSpec - 25.1.4 Time HyperSpec - 25.1.4.1 Decoded Time HyperSpec - 25.1.4.2 Universal Time HyperSpec - 25.1.4.3 Internal Time HyperSpec - 3.5.1.1.1 Error Detection Time in Safe Calls HyperSpec - Macro TIME On Lisp - A Sample ATN On Lisp - Objects in Plain Lisp PCL - make it work make it right make it fast Successful Lisp - efficiency

read-time
	Mentioned in: HyperSpec - 1.5.2.1.1 Use of Read-Time Conditionals

(load-time-value form &optional read-only-p)	Function: Arrange for FORM to be evaluated at load-time and use the value produced as if it were a constant. If READ-ONLY-P is non-NIL, then the resultant object is guaranteed to never be modified, so it can be put in read-only storage.
	Mentioned in: CLtL2 - 25.1. The Compiler CLtL2 - 25.1.2. Compiled Functions HyperSpec - Special Operator LOAD-TIME-VALUE PCL - other special operators

(get-decoded-time)	Function: Return nine values specifying the current time as follows: second, minute, hour, date, month, year, day of week (0 = Monday), T (daylight savings times) or NIL (standard time), and timezone.
Example: (defun now () "This function returns (hour minute second) for right now." (multiple-value-bind (second minute hour) (get-decoded-time) (values hour minute second)))	Mentioned in: CLtL2 - 25.4.1. Time Functions HyperSpec - Function GET-UNIVERSAL-TIME, GET-DECODED-TIME

(get-universal-time)	Function: Return a single integer for the current time of day in universal time format.
Example: (defun localtime () (system-clock nil (get-universal-time)))	Mentioned in: CLtL2 - 25.4.1. Time Functions HyperSpec - Function GET-UNIVERSAL-TIME, GET-DECODED-TIME PCL - cookies

(decode-universal-time universal-time &optional time-zone)	Function: Converts a universal-time to decoded time format returning the following nine values: second, minute, hour, date, month, year, day of week (0 = Monday), T (daylight savings time) or NIL (standard time), and timezone. Completely ignores daylight-savings-time when time-zone is supplied.
	Mentioned in: CLtL2 - 25.4.1. Time Functions HyperSpec - Function DECODE-UNIVERSAL-TIME

(encode-universal-time second minute hour date month year &optional time-zone)	Function: The time values specified in decoded format are converted to universal time, which is returned.
	Mentioned in: CLtL2 - 25.4.1. Time Functions HyperSpec - function ENCODE-UNIVERSAL-TIME PCL - cookies

(get-internal-run-time)	Function: Return the run time used by the process in the internal time format. (See INTERNAL-TIME-UNITS-PER-SECOND.) This is useful for finding CPU usage. Includes both "system" and "user" time.
	Mentioned in: CLtL2 - 25.4.1. Time Functions HyperSpec - Function GET-INTERNAL-RUN-TIME PCL - make it work make it right make it fast

(hunchentoot:session-max-time object)	Undocumented


(get-internal-real-time)	Function: Return the real time ("wallclock time") since startup in the internal time format. (See INTERNAL-TIME-UNITS-PER-SECOND.)
	Mentioned in: CLtL2 - 25.4.1. Time Functions HyperSpec - Function GET-INTERNAL-REAL-TIME PCL - make it work make it right make it fast

hunchentoot:session-max-time	Variable: The default time (in seconds) after which a session times out.


hunchentoot:+http-gateway-time-out+	Variable: HTTP return code (504) for 'Gateway Time-out'.


hunchentoot:+http-request-time-out+	Variable: HTTP return code (408) for 'Request Time-out'.


trivial-backtrace:date-time-format	Variable: The default format to use when printing dates and times. * %% - A '%' character * %d - Day of the month as a decimal number [01-31] * %e - Same as %d but does not print the leading 0 for days 1 through 9 [unlike strftime[], does not print a leading space] * %H - Hour based on a 24-hour clock as a decimal number [00-23] %I - Hour based on a 12-hour clock as a decimal number [01-12] %m - Month as a decimal number [01-12] * %M - Minute as a decimal number [00-59] * %S - Second as a decimal number [00-59] * %w - Weekday as a decimal number [0-6], where Sunday is 0 * %y - Year without century [00-99] * %Y - Year with century [such as 1990] This code is borrowed from the `format-date` function in [metatilities-base][].


internal-time-units-per-second	Variable: The number of internal time units that fit into a second. See GET-INTERNAL-REAL-TIME and GET-INTERNAL-RUN-TIME.
Example: (defun time-string (time) "Return a string representing this internal time in min:secs." (multiple-value-bind (min sec) (floor (round time internal-time-units-per-second) 60) (format nil "~2d:~2,'0d" min sec)))	Mentioned in: CLtL2 - 25.4.1. Time Functions HyperSpec - Constant Variable INTERNAL-TIME-UNITS-PER-SECOND PCL - make it work make it right make it fast

(atom object)	Function: Return true if OBJECT is an ATOM, and NIL otherwise.
Example: (defun label-p (x) "Is x a label?" (atom x))	Mentioned in: CLtL2 - 15.5. Using Lists as Sets CLtL2 - 2.4. Lists and Conses CLtL2 - 6.2.2. Specific Data Type Predicates CLtL2 - 7.8.2. General Iteration HyperSpec - Function ATOM HyperSpec - Type ATOM On Lisp - A Query Interpreter On Lisp - An Interpreter On Lisp - Chapter _28 On Lisp - Continuation-Passing Macros On Lisp - Operations on Lists On Lisp - Other Structures On Lisp - Recursion on Subtrees On Lisp - Recursion on Subtrees (Macros Returning Functions) PCL - list manipulation functions Successful Lisp - evaluated