Help me in finding out the exact difference between time and timeit magic commands in jupyter notebook.
%time
a="stack overflow"
time.sleep(2)
print(a)
It shows only some micro seconds, But I added sleep time as 2 seconds
Magics that are prefixed with double percentage signs (%%) are considered cell magics. This differs from line magics which are prefixed with a single percentage sign (%).
It follows that,
time is used to time the execution of code either at a line level (%) or cell level (%%).timeit is similar but runs the code multiple times to provide more accurate and statistically significant timing information.The key distinction is that %time and %%time (docs) measure the execution time of code once, while %timeit and %%timeit (docs) measure the execution time of code multiple times to give an average time and standard deviation.
Hence,
%%time
a="stack overflow"
time.sleep(2)
print(a)
This output shows both the CPU time and the wall time. The wall time includes the 2 seconds sleep time, while the CPU time accounts for the actual processing time.
Replacing %%time with %time will show the CPU time and the wall time for the next single line that is executed.