Test performance

After trying to update parse server to 4.x in production I notice a very slow response time. So I created this simple test to reproduce the problem found.

Preparation

$ npm install -g mongodb-runner
$ mongodb-runner start

Execution:

• Clone this repo
• $ npm i
• Run node ./tester.js create once to create the collections
• Run the test with version 3.10.0
  • $ node ./tester.js
• Save metrics
• npm i parse-server@4.5.0
• Run the test again with version 4.5
  • $ node ./tester.js
• Compare results

Results running with my MBP 16

parse-server@3.10.0

Created 300 accounts in parallel through cloud function (Installation + User + Account)
accounts: 6.773s
Created 400 myObjects in parallel
objectsP: 658.257ms
Created 400 myObjects in sequence
objectsS: 1.320s

parse-server@4.5.0

Created 300 accounts in parallel through cloud function (Installation + User + Account)
accounts: 19.303s
Created 400 myObjects in parallel
objectsP: 7.482s
Created 400 myObjects in sequence
objectsS: 4.174s

Question 1

Why these errors only appear in Parse server 4.5? They disappear if I reduce the number of parallel accounts creation

error: Uncaught internal server error. {"stack":"Error"}
error: Uncaught internal server error. {"stack":"Error"}
error: Uncaught internal server error. {"stack":"Error"}
error: Uncaught internal server error. {"stack":"Error"}
[Error]
[Error]
[Error]
[Error]
[Error]
[Error]

Question 2

Why creating objects in parallel now takes longer?