time
| Definition: | atom a = time() |
| Description: | Return the number of seconds since some fixed point in the past. |
| pwa/p2js: | Supported. |
| Comments: |
To measure how long a section of code takes to execute, take the difference between two readings of time().
On Windows the resolution is normally about 0.01 seconds, whereas on Linux the resolution is normally 1 second. To get the current time, use eg format_timedate(date(),"h:mmpm") To display an elapsed time (over 60 seconds) as a human-readable string, use elapsed() (instead of ?). |
| Example: |
constant ITERATIONS = 1000000
integer p
atom t0 = time(), loop_overhead
for i=1 to ITERATIONS do
-- time an empty loop
end for
loop_overhead = time() - t0
t0 = time()
for i=1 to ITERATIONS do
p = power(2, 20)
end for
? (time() - t0 - loop_overhead)/ITERATIONS
-- calculates time (in seconds) for ITERATIONS calls to power()
|
| Implementation: | via :%opTime in builtins\VM\pTime.e (an autoinclude) |
| See Also: | date, format_timedate, elapsed |