Players most commonly report seeing an increase in lag on their home islands and on more established saves. Lag has also been reported when traveling from island to island, especially as the island the player is approaching begins to load in.
One of the common factors in saves where players report this occurring is a significant amount of gathered resources on the home island. Reducing the number of loose items may help towards a reduction in lag.
Most common reported items that when cleared up have helped players are: Sticks, stones and fiberous leaves. Please note however that the amount a player has on their island in comparison to other items may be a factor in this.
Players have recently reported noticing that red containers may be impacting lag buildup. This may appear in the form of the red container duplication glitch that spawns multiple containers in the one spot, or the use of a lot of red container parts in building on an island. If this is the case on your island, please try swapping these parts for other materials such as planks or sticks.
Similar to the above potential trigger, there is an issue can may result in plants in planters duplicating. While not a commonly reported as a potential trigger for lag like the red containers, if a save is established enough there may be a significant overlap of planters on an island.
Please see the comment [Known Issue] Lag buildup / performance drops - #14 by TheMonster14544 below which refers to wild grown Yucca and how not harvesting fruit with the leaves may impact lag
If you find the lag when traveling occurs when traveling only to a particular type of island or around a specific object, please let us know in the comments below.
If you find lag or performance drops are occurring for you and your situation does not match those listed above, please create a new post in the main Bug Reports section.
If you have noticed a lag increase after using a specific material, please let us know