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The magic command %time produces the time it takes to execute a given code segment (statement) to the output cell in Jupyter Notebook. I would like this to be appended on to a specified file instead.

My objective is to find the runtime of an algorithm in different settings. I am able to automate the parameters of the algorithm, although not able to store the output of the %time (and %timeit) magic command in a file for further processing.

Is this possible?

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  • %timeit (but not %time) has a -o option which makes it return an object, so you can do res = %timeit -o foo(). Then you can get the numbers from res and write them to a file however you wish. For more flexibility, use the timeit module in the standard library. Commented Nov 19, 2016 at 15:50
  • @ThomasK That's nice. I'd be happier if you could post this comment as an answer. Commented Nov 19, 2016 at 16:21

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Reposting as an answer:

%timeit (but not %time) has a -o option which makes it return an object, so you can do:

res = %timeit -o foo()

Then you can get the numbers from res and write them to a file however you wish.

For more flexibility, use the timeit module in the standard library.

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