Reducing time to cast a ballot

[ineiti]

Currently casting the 1000th ballot takes about 5.5s. This must be reduced to

• at maximum 5 elections * 1000 ballots with 1s to cast a ballot: 200ms
• in the best case 1s to cast a ballot with 5 elections * 10'000 ballots: 20ms

After many measurements, the main bottlenecks are:

• Syncing - which sends the whole chain to all the nodes after every block - Making Sync faster #54
  • If no syncing necessary, reduces the time for the 1000th ballot to 600ms
• (De)serializing of the election data - Making (De)serializing the election contract faster #55
  • If it is cut by 10, 1000th ballot will take 60ms
• The leader executing the CastVote contract twice - Don't execute smartcontracts twice on the leader #56
  • The 1000th ballot will take 40ms

And, finally, test it all... #125

Of course this all needs to be verified on a more realistic network, too, and from the client's point of view.

[PascalinDe]

is this still an issue?

[ineiti]

Implemented, tested in EPFL elections in 2024, all good...