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#X obj 0 0 cnv 15 552 40 empty \$0-pddp.cnv.header cputime 3 12 0 18
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#X text 12 125 LIBRARY internal;
#X text 12 165 WEBSITE http://crca.ucsd.edu/~msp/;
#X text 12 25 LICENSE SIBSD;
#X text 12 145 AUTHOR Miller Puckette;
#X text 12 205 HELP_PATCH_AUTHORS This help patch was updated for Pd
version 0.35 test 28 by Dave Sabine as part of a project called pddp
proposed by Krzysztof Czaja to build comprehensive documentation for
Pd. Jonathan Wilkes revised the patch to conform to the PDDP template
for Pd version 0.42.;
#X text 12 5 KEYWORDS control time;
#X text 12 45 DESCRIPTION measure CPU time;
#X text 12 65 INLET_0 bang;
#X text 12 85 INLET_1 bang;
#X text 12 105 OUTLET_0 float;
#X text 12 185 RELEASE_DATE 1997;
#X restore 500 597 pd META;
#X obj 0 407 cnv 3 550 3 empty \$0-pddp.cnv.outlets outlets 8 12 0
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#X obj 0 450 cnv 3 550 3 empty \$0-pddp.cnv.argument arguments 8 12
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#X obj 0 478 cnv 3 550 3 empty \$0-pddp.cnv.more_info more_info 8 12
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#X text 98 454 (none);
#X text 98 416 float;
#N canvas 48 338 428 252 Related_objects 0;
#X obj 125 35 metro;
#X obj 62 35 realtime;
#X obj 14 36 timer;
#X obj 173 35 delay;
#X text 11 170 The best places to find information about Pd's libraries
is:;
#X text 8 192 www.puredata.org and click on "Downloads" then "Software"
;
#X text 10 207 or;
#X text 10 222 iem.kug.ac.at/pdb/;
#X text 12 121 This object is only offered in Pd only if you have downloaded
and properly installed the appropriate library. These objects may or
may not exist in a single library.;
#X text 11 71 Externals;
#X obj 1 1 cnv 15 425 20 empty \$0-pddp.cnv.subheading empty 3 12 0
14 -204280 -1 0;
#X text 7 1 [cputime] Related Objects;
#X obj 11 91 pddp/helplink iemlib/t3_timer;
#X restore 102 597 pd Related_objects;
#X obj 471 3 cputime;
#X obj 445 20 pddp/pddplink http://wiki.puredata.info/en/cputime -text
pdpedia: cputime;
#X msg 122 156 bang;
#X msg 83 134 bang;
#X floatatom 83 200 0 0 0 0 - - -;
#X text 155 202 Output is in milliseconds;
#X text 118 134 Click here to start or reset;
#X text 78 57 The [cputime] object measures elapsed CPU time. CPU time
is the amount of time your computer's CPU requires to perform a task
-- that's a short definition.;
#X obj 83 178 cputime;
#X text 160 157 Click here to get elapsed CPU time. Click again...and
again...to see periodic measurements from the start or reset time.
Be patient.;
#X obj 78 374 cnv 17 3 17 empty \$0-pddp.cnv.let.1 1 5 9 0 16 -228856
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#X text 98 373 bang;
#X text 168 416 - the elapsed time in milliseconds arrives at the outlet
when the right inlet receives a bang.;
#X text 80 264 NOTE: Unlike most other objects in Pd \, the right inlet
of [cputime] is the hot one (i.e. \, a bang to it triggers the output).
;
#N canvas 70 46 428 538 Time_Measurements 0;
#X obj 30 395 time_measurements;
#X obj 30 291 bng 15 250 50 0 empty empty empty 0 -6 0 8 -262144 -1
-1;
#X floatatom 30 437 0 0 0 0 - - -;
#X floatatom 116 436 0 0 0 0 - - -;
#X floatatom 183 436 0 0 0 0 - - -;
#X text 27 208 In the example below \, I've created an abstraction
which will force each of Pd's stop-watches \, [timer] [cputime] and
[realtime] to measure various processes and report the elapsed time.
Click on each [bng] to begin the process and wait for the results.
Notice the discrepancies in the results.;
#X text 28 455 Logical Time;
#X text 181 455 Real Time;
#X text 115 455 CPU Time;
#X obj 45 327 bng 15 250 50 0 empty empty empty 0 -6 0 8 -262144 -1
-1;
#X text 50 285 1 Measures elapsed time between two "bangs" from a [trigger]
object.;
#X text 65 319 2 Measures the amount of time Pd requires to turn on
DSP and start an oscillator.;
#X obj 89 359 bng 15 250 50 0 empty empty empty 0 -6 0 8 -262144 -1
-1;
#X text 27 487 This document was updated for Pd version 0.35 test 28
by Dave Sabine as part of a project called pddp proposed by Krzysztof
Czaja to build comprehensive documentation for Pd.;
#X text 110 351 3 Measures the amount of time Pd requires count to
three...please wait for approximately 3 seconds.;
#X text 27 35 [cputime] works like essentially like a stop-watch. Once
it starts \, you can continue to "poll" [cputime] to view the elapsed
time.;
#X text 27 82 The odd aspect about comparing [cputime] to a stop-watch
is that a stop-watch can be stopped! [cputime] can only be started
or reset. It cannot be stopped.;
#X text 26 132 As stated above \, [cputime] measures "CPU" time. This
value may be slightly different than "logical" time or "real" time.
PD offers two objects which measure "logical" time and "real" time.
See the reference documents for those objects for more information.
;
#X obj 1 1 cnv 15 425 20 empty \$0-pddp.cnv.subheading empty 3 12 0
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#X text 7 1 [cputime] Time Measurements;
#X connect 0 0 2 0;
#X connect 0 1 3 0;
#X connect 0 2 4 0;
#X connect 1 0 0 0;
#X connect 9 0 0 1;
#X connect 12 0 0 2;
#X restore 102 511 pd Time_Measurements;
#N canvas 70 77 428 430 Time_Objects 0;
#X text 21 37 In a fantasy world \, computers could exist somehow beyond
the restrictions of time and digital computation could be performed
in ZERO time. However \, that is not the case. Instead \, every process
within Pd and within your operating system requires at least a few
nanoseconds of your CPU's time.;
#X text 22 122 The [timer] object is like a clock that is not constrained
to the regular laws of physics and the universal space-time continuum.
It reports "time" measurements as only Pd can see them!;
#X text 23 181 The [cputime] object is like a clock that measures how
much time your CPU actually required to carry out your request. Keep
in mind however that your CPU is busy doing many things simoultaneously
\, so even though a process might take 5 minutes to complete \, your
CPU does not pay full attention to that process for the entire 5 minutes.
Instead \, it simply begins the process \, then refers back to that
process from time to time until the it is complete. In other cases
\, your CPU might require a full 5 minutes while Pd might report that
merely a few milliseconds have passed. This type of discrepancy depends
heavily on your computer's hardware and the type of processing it is
performing.;
#X text 24 350 The [realtime] object is as much like your own wrist
watch as Pd can possibly manage. It measures time according to your
operating system's internal clock.;
#X obj 1 1 cnv 15 425 20 empty \$0-pddp.cnv.subheading empty 3 12 0
14 -204280 -1 0;
#X text 7 1 [cputime] Why the Discrepencies Between Clocks?;
#X restore 102 486 pd Time_Objects;
#X obj 78 416 cnv 17 3 17 empty \$0-pddp.cnv.let.0 0 5 9 0 16 -228856
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#X text 11 23 measure CPU time;
#X text 98 341 bang;
#X text 168 341 - an initial bang to the left inlet starts the timer.
Subsequent bangs reset the timer.;
#X text 168 373 - a bang to the right inlet causes the elapsed time
to be output (in milliseconds).;
#X obj 4 597 pddp/pddplink all_about_help_patches.pd -text Usage Guide
;
#X text 101 531 For a patch that uses [cputime] see:;
#X obj 98 551 pddp/pddplink ../7.stuff/tools/load-meter.pd;
#X text 101 571 (also accessible from the "Media" menu);
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#X connect 14 0 19 0;
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