[ENH] Timing experiment function

[MatthewMiddlehurst]

and other minor changes

[tsml-actions-bot]

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I have added the following labels to this PR based on the title: [ $\color{#FEF1BE}{\textsf{enhancement}}$ ].
I have added the following labels to this PR based on the changes made: [ $\color{#8649A7}{\textsf{experiments}}$ ]. Feel free to change these if they do not properly represent the PR.

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