diff --git a/stress.project.json b/stress.project.json
new file mode 100644
index 0000000..7962bad
--- /dev/null
+++ b/stress.project.json
@@ -0,0 +1,19 @@
+{
+	"name": "Stress",
+	"tree": {
+		"$className": "DataModel",
+		"ReplicatedStorage": {
+			"$className": "ReplicatedStorage",
+			"$path": "DevPackages",
+			"ecs": {
+				"$path": "jecs.luau"
+			}
+		},
+		"ReplicatedFirst": {
+			"$className": "ReplicatedFirst",
+			"stres": {
+				"$path": "stress.client.luau"
+			}
+		}
+	}
+}
diff --git a/test/stress.client.luau b/test/stress.client.luau
new file mode 100644
index 0000000..13b5e86
--- /dev/null
+++ b/test/stress.client.luau
@@ -0,0 +1,122 @@
+local RunService = game:GetService("RunService")
+local ReplicatedStorage = game:GetService("ReplicatedStorage")
+_G.__JECS_HI_COMPONENT_ID = 300
+local ecs = require(ReplicatedStorage.ecs)
+
+-- 500 entities
+-- 2-30 components on each entity
+-- 300 unique components
+-- 200 systems
+-- 1-10 components to query per system
+
+local startTime = os.clock()
+
+local world = ecs.World.new()
+
+local components = {}
+
+for i = 1, 300 do -- 300 components
+	components[i] = world:component()
+end
+
+local archetypes = {}
+for i = 1, 50 do -- 50 archetypes
+	local archetype = {}
+
+	for _ = 1, math.random(2, 30) do
+		local componentId = math.random(1, #components)
+
+		table.insert(archetype, components[componentId])
+	end
+
+	archetypes[i] = archetype
+end
+
+for _ = 1, 1000 do -- 1000 entities in the world
+	local componentsToAdd = {}
+
+	local archetypeId = math.random(1, #archetypes)
+	local e = world:entity()
+	for _, component in ipairs(archetypes[archetypeId]) do
+		world:set(e, component, {
+			DummyData = math.random(1, 5000),
+		})
+	end
+end
+
+local function values(t)
+	local array = {}
+	for _, v in t do
+		table.insert(array, v)
+	end
+	return array
+end
+
+local contiguousComponents = values(components)
+local systemComponentsToQuery = {}
+
+for _ = 1, 200 do -- 200 systems
+	local numComponentsToQuery = math.random(1, 10)
+	local componentsToQuery = {}
+
+	for _ = 1, numComponentsToQuery do
+		table.insert(componentsToQuery, contiguousComponents[math.random(1, #contiguousComponents)])
+	end
+
+	table.insert(systemComponentsToQuery, componentsToQuery)
+end
+
+local worldCreateTime = os.clock() - startTime
+local results = {}
+startTime = os.clock()
+
+RunService.Heartbeat:Connect(function()
+	local added = 0
+	local systemStartTime = os.clock()
+	debug.profilebegin("systems")
+	for _, componentsToQuery in ipairs(systemComponentsToQuery) do
+		debug.profilebegin("system")
+		for entityId, firstComponent in world:query(unpack(componentsToQuery)) do
+			world:set(
+				entityId,
+				{
+					DummyData = firstComponent.DummyData + 1,
+				}
+			)
+			added += 1
+		end
+		debug.profileend()
+	end
+	debug.profileend()
+
+	if os.clock() - startTime < 4 then
+		-- discard first 4 seconds
+		return
+	end
+
+	if results == nil then
+		return
+	elseif #results < 1000 then
+		table.insert(results, os.clock() - systemStartTime)
+	else
+		print("added", added)
+		print("World created in", worldCreateTime * 1000, "ms")
+		local sum = 0
+		for _, result in ipairs(results) do
+			sum += result
+		end
+		print(("Average frame time: %fms"):format((sum / #results) * 1000))
+
+		results = nil
+
+		local n = #world.archetypes
+
+		print(
+			("X entities\n%d components\n%d systems\n%d archetypes"):format(
+				#components,
+				#systemComponentsToQuery,
+				n
+			)
+		)
+	end
+end)