Replication testing

[colbert2677 (ImagineerColbert)]

References

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Official

LocalPlayer Timing Update

Hi All! Today, we have enabled a minor change that will delay the creation of LocalPlayer in preparation for another feature. LocalScript will still run after LocalPlayer can be detected, so this will not affect any LocalScripts in your games and should only affect Roblox’s CoreScripts. What does that mean for you? Nothing! This change should be completely transparent to you. There is no need to change any localscripts or how you detect Localplayer. The timing is delayed from before establis…

When to wait for replication to the client

Hi Devs! I wanted to share some information about some unclear points regarding the starting of localscripts and when replication occurs. I will also share the guarantees that we will provide soon. Until now, developers need to guess when localscripts starts running and what instances can be referenced at start. Today, I wanted to explain a little about some guarantees that will go live soon that will help you with what is needed and what’s not needed when writing code in your localscripts. T…

Speculative

Player instance now created on server instead of client

There seems to be a lot of confusion, so I made a diagram. Note that it is based only on my observations, and is not authoritative. [replication] Each step depends on the completion of the previous step (on the same peer, anyway). The client connects. A snapshot of the objects under ReplicatedFirst is queued to be replicated. The server starts replicating objects in the queue to the client. Once the client has received all the objects, scripts under ReplicatedFirst start running. A snapshot…

Player instance now created on server instead of client

Yes, and that’s one point where it gets confusing. It is important to remember that scripts run depending on where they are located. Theoretically, a LocalScript might replicate and then begin running immediately. In most cases however, any container where they could replicate is a container where they can’t run (StarterGui, StarterPlayerScripts, almost everything, really). And, for any container where they can run (PlayerGui, etc), scripts are copied from the respective Starter container (Star…

Notes

• Both posts in the speculation category are written by a platform expert, but are based on observations and are not representative of actual ordering.

• The official posts, specifically “When to wait for replication to the client”, explains (?) replication ordering but I frankly don’t know what to believe. I’ll try seeing if my tests align up with that. If so, I’ll have my answer regarding ordering.

• “When to wait for replication to the client” was written later than Anaminus’ chart, meaning that such discussion must have spurred engineers to respond with an official statement. I still use the latter post more often but maybe I should start using the former.

• These tests could be completely stupid and unnecessary since an engineer literally wrote a post about replication. I’d still like to test around a bit though, get the gears going.