Adding Performance Evaluation to Numpy Exercise

[HumphreyYang]

Hi @mmcky,

This resolves #230. Could you please kindly review this PR and let me know if there is anything I could change?

Many thanks

[mmcky]

thanks @HumphreyYang I think this is a good addition.

[mmcky]

@jstac if you approve then I'll merge.

[jstac]

Thanks @HumphreyYang , nice work.

My only comment is that in #230 I suggested "adding a second part to the exercise where 4 is replaced by a large number and the reader is asked to time a for loop against the broadcast implementation."

In other words, the reader first replicates on a small example to make sure that they are getting the same result, and then tests the two versions on a larger example to investigate timing.

Do you think this is worthwhile?

[HumphreyYang]

Hi @jstac,

I have added back the sample example. Could you have another look at the newest deployment?

Many thanks.

[jstac]

Perfect. Thanks @HumphreyYang! Merging.