I’m currently (as of 5th March) experiencing a nasty memory leak with EditableMeshes.
Here is a video demonstration (please note that this video is sped up and a lot of editable meshes were generated making the issue seem more exacerbated).
Reproduction Steps:
Run This Script:
--!strict
local RunService = game:GetService("RunService")
local CHUNK_SIZE, CHUNK_SCALE = 100, 5
local SCALED_CHUNK_SIZE = CHUNK_SIZE - 1
local CHUNK_BOUNDS_X = (CHUNK_SIZE ^ 2) - CHUNK_SIZE
local RENDER_DIST = 25
local function CreateChunk(xOffset: number, zOffset: number)
local eMesh = Instance.new("EditableMesh")
local vertices = table.create(CHUNK_SIZE * 2)
local iter = 1
for x = 1, CHUNK_SIZE do
for z = 1, CHUNK_SIZE do
local scaledX, scaledZ = x + (xOffset * SCALED_CHUNK_SIZE), z + (zOffset * SCALED_CHUNK_SIZE)
local vertPos = Vector3.new(scaledX, math.noise(scaledX / 16, scaledZ / 16) * 10, scaledZ) * CHUNK_SCALE
vertices[iter] = eMesh:AddVertex(vertPos)
iter += 1
end
end
for iter = 1, CHUNK_SIZE ^ 2 do
if (iter % CHUNK_SIZE == 0) or (iter >= CHUNK_BOUNDS_X) then continue end
local vertA, vertB, vertC, vertD =
vertices[iter], vertices[iter + CHUNK_SIZE],
vertices[iter + CHUNK_SIZE + 1], vertices[iter + 1]
eMesh:AddTriangle(vertC, vertB, vertA)
eMesh:AddTriangle(vertD, vertC, vertA)
end
local mesh = Instance.new("MeshPart")
mesh.Anchored = true
mesh.Size = Vector3.one
eMesh.Parent = mesh
mesh.Parent = workspace
return mesh :: MeshPart & { EditableMesh: EditableMesh }
end
local chunks: { MeshPart & { EditableMesh: EditableMesh } } = table.create(RENDER_DIST ^ 2)
while true do
task.wait(5)
print("generating")
local iter = 1
for x = 1, RENDER_DIST do
for z = 1, RENDER_DIST do
chunks[iter] = CreateChunk(x, z)
iter += 1
if iter % 20 == 0 then RunService.Stepped:Wait() end
end
end
task.wait(1)
print("destroying")
for chunkIdx, chunk in chunks do
chunks[chunkIdx] = nil
chunk.EditableMesh:Destroy()
chunk:Destroy()
if iter % 5 == 0 then RunService.Stepped:Wait() end
end
task.wait(1)
end
This script repetitively generates and deletes a ton of EditableMeshes. (this was also the script used in the video demonstration above).
