Chore: Server: Debug: Add debug benchmarkDeltaPerformance API

[personalizedrefrigerator]

Summary

Adds a new debug benchmarkDeltaPerformance API to Joplin Server. Like the other debug API endpoints, benchmarkDeltaPerformance is only enabled in dev mode.

The benchmarkDeltaPerformance endpoint:

1. Loops through all users.
2. Measures how long models.change().delta takes to run for the current user.
3. Repeats steps 1-2 several more times.
4. Writes the results to a CSV file.

This is the API that was used to generate the tables in #13655 (comment).

Manual testing plan

1. Run

   curl --data '{"action":"benchmarkDeltaPerformance"}' -H 'Content-Type: application/json' http://localhost:22300/api/debug
   

2. Verify that packages/server/delta-perf.csv exists and has content similar to:

   user.id, share count, user item count, total item size, average delta time (ms)
   rm6pECHyFP206hIqqLYFcb,12208,37564,5044231,932.6840926999982
   dyg1imrqdlbzCx2VhIPvxi,12097,37678,5066994,1006.9090389999852
   6jXsuuLvkamu0MsVarv6tf,12166,37977,4984522,1046.4843974000019
   bYfMHaGNVIH5d7Nwx58GfE,12237,37738,5059262,1129.4750577000027
   18fQWEoZU4MPFJejfCgcef,12271,38059,4967876,933.2209174000076
   dBFPfBUYjHoddB9DzfOEw8,12363,38443,5086866,941.5754076999904
   1thkhvWwq1FgWlkN2WfHsm,12391,37941,5012717,1018.9216304999893
   155BdeCLPzNddRbvhXMI9H,12372,38094,5050532,894.4402346999966
   ivik7PUoVFlRLOmzWTnzxN,12221,37861,5167072,862.2404661000066
   jFl1PFAo3un3oUInH7n9wY,12240,38126,4968194,775.7858183999895
   f5Xb443bR0dtnYiL26WTY3,10,32,9830,40.194779000000565
   uemlqC6dzuIWNmT1bT4Dyg,15,67,21554,29.212947900028666
   FfUKuk3Q1OO5HO28MIH4dr,18,53,18590,41.03838019999093
   ewGrY66oMkVxKAMZR2irg8,21,41,13260,52.91299810000928
   D9GyBsyTWrCvqdigC1butS,14,65,20467,47.2022217000078
   uYGFhkyr5kggj8oKm1PNCa,16,60,19124,48.39116229997599
   DOH3iMW7uDSb9FH8jb0RlC,18,36,13866,60.30182369999238
   gRckvcTjTsTh6pcCLzqYXz,16,63,20686,40.83253420000547
   Ubyz2rOjTdHpjamX2SsKa0,17,68,21280,34.895353599998636
   ZkFrMT4VCliWn8erGvmyKv,21,55,18245,54.702609500009565
   z3eBQPIRrxLTapCyFCFbMX,0,0,0,16.536613000003854
   

[laurent22]

Please could you add a documentation for it, with an explanation why and how it can be useful?

Edit: also please add to that same documentation information about this one: #13800

[personalizedrefrigerator]

Please could you add a documentation for it, with an explanation why and how it can be useful?

Good idea! Documentation has been added to server_debug.md.