How often do unreliable remote events fail?

Just curious how often is it that the requests get ignored.

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There are a lot of factors that determine this. There are plenty of spots where packets can be lost. The internet is a lot of interconnected computers and if one looses the message it can’t continue. If the wifi signals get blocked it can’t continue. The amount it will drop will vary significantly from user to user. As for an average, you’d probably just have to write something to test it yourself. Basically an unreliable remote event just sends the packets and doesn’t have mechanisms for determining if the packet was actually received. More reliable messages on the internet usually are like unreliable remote events, but send acknowledgments back to the sender and track packet numbers so they can tell when a message isn’t received. Unreliable remote events probably just ignore all of that because not every situation needs old packets and would just be a waste of time and bandwidth to track it. If you need the data for sure, don’t use unreliable events. Or at least back up the important information with reliable events.

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My use case would just be a visual effect on the client which obviously isn’t necessary to run all the time. I was just wondering how often it could fail because it’d be bad if it were failing every few tries.

If the roblox client hasn’t significantly lagged due to excessive packet loss, then it probably is getting most of the packets. So for your use case it probably will be fine in most cases so long as you can absorb up to a few consecutive missed packets.

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