Add analysis view table containing workflow timing statistics

[JAllen42]

Partially addresses #1170
Linked with cylc/cylc-uiserver#434
Based on the proof of concept #1171

This adds a table view containing statistics of the timings of tasks in a workflow. Currently this includes mean, standard deviation, minimum, maximum, median and quartiles, which can be calculated using the queue times for tasks, run times or the total time. These can be filtered based on the name of the task and which platform the tasks was run on.

The proof of concept query which loads job information from the workflow database has been changed to load task information instead, and the subscription has been deleted and replaced with a button to rerun the query.

Check List

• I have read CONTRIBUTING.md and added my name as a Code Contributor.
• Contains logically grouped changes (else tidy your branch by rebase).
• Does not contain off-topic changes (use other PRs for other changes).
• Applied any dependency changes to both setup.cfg (and conda-environment.yml if present).
• Tests are included (or explain why tests are not needed).
• CHANGES.md entry included if this is a change that can affect users
• Cylc-Doc pull request opened if required at cylc/cylc-doc/pull/XXXX.
• If this is a bug fix, PR should be raised against the relevant ?.?.x branch.

[oliver-sanders]

Looks good 👍

[oliver-sanders]

This branch is now a little behind master and will require rebasing at some point:

$ git fetch upstream
$ git checkout analysis_view
$ git branch analysis_view.safe  # make a safe copy before starting
$ git rebase upstream/master
$ # fix any conflicts flagged during rebase
$ git add -u && git rebase --continue  # if there were any conflicts
$ git push -f origin HEAD

[JAllen42]

This has been rebased and restructured slightly to make it easier to add the tests.

There might need to be a couple of minor changes if the structure of the data is tweaked in the sibling ui-server branch, but other than that I think this is ready for review

[MetRonnie]

Looks good! I still need to test with a real workflow

@JAllen42 You need to add an entry to .mailmap, something like

Jamie Allen       <your.metoffice@email.address>      JAllen42     <your.git.commit@email.address>

[MetRonnie]

The convention for these standalone views is to hide the sidebar, unless there is a reason not to in this case?

Suggested change

	toolbar: true
	toolbar: true,
	showSidebar: false

[MetRonnie]

🚀

[oliver-sanders]

Looks good, works smoothly, nice!

Pagination, filtering, timing and platform selection all work well.

I tried being an impatient user hammering the refresh button and managed to find one small issue where repeat presses can cause duplicate tasks.

Press once:

Press three times:

There's a neat trick to handle users hammering buttons called debounce which you can find in the lodash library.

There's an example usage in this PR in src/views/Log.vue. You wrap your function with debounce, then duplicate calls within the specified timeframe will effectively be ignored:

methods: {
  historicalQuery: debounce(
    async function () {
      this.tasks = []
      ...
    },
    500  // only call this once every 500ms
  }
}

This article provides an explanation: https://css-tricks.com/debouncing-throttling-explained-examples/#aa-debounce

This is relatively minor so not a blocker, but if possible it would be good to get this debounced befure it shows up in the wild.

[hjoliver]

Functional review: an excellent addition to Cylc - thanks @JAllen42 and @ChrisPaulBennett

(I'll hold off merging till the debounce question is addressed).

[oliver-sanders]

I'm afraid you've picked up a couple more conflicts, rebase instructions or alternatively use the "resolve conflicts" button below (note if use use the button the commit won't appear automatically in your local branch)

[oliver-sanders]

Cheers!