Re: [Reduce-algebra-developers] How to use on time; in reduce to record time used for a command?

[Francis W. <f.j...@li...>]

You can get the time taken for a computation in millisecond in the REDUCE variable time_taken like this:

% Make the Lisp time function available in algebraic mode.
% It returns CPU time since the program started in milliseconds as an integer.
symbolic operator time;

start_time := time();
% Evaluate an integral (for example)...
time_taken := time() - start_time;

Francis

________________________________
From: Nasser M. Abbasi <nm...@12...>
Sent: 04 January 2024 1:09 AM
To: red...@li... <red...@li...>; Nasser M. Abbasi <nm...@12...>
Subject: [Reduce-algebra-developers] How to use on time; in reduce to record time used for a command?

I am new learning reduce. I need to record CPU time used
by the integrate command.

I see in the manual, at page 70, there is on time; and off time;

"causes the system to print a message after
each command giving the elapsed CPU time since the last command"

Could someone please show me how the Reduce code will look
like if one wants to _save_ the time time used in a variable? For
example

    on time;
    int(sin(x),x);
    off time;

Since it prints time used on the screen, this is not useful
for me. I need to find the time used and save it to
variable, so that eventually write the record to a file.

I just do not know how to capture the output and convert it
to a numerical value and save it to a variable.

Thanks
--Nasser




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