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var test = require("tape")
var mobx = require("../../lib/mobx.js")
var observable = mobx.observable
var computed = mobx.computed
var log = require("./index.js").logMeasurement
function gc() {
if (typeof global.gc === "function") global.gc()
}
function voidObserver() {
// nothing, nada, noppes.
}
/*
results of this test:
300/40000 mseconds on netbook (AMD c60 processor, same test is on Intel i7 3770 ~10 times faster)
220/37000 after removing forEach
140/30000 after not using (un)shift / pop / push
186/113 after remove filter/length call to detect whether depencies are stable. 300 times faster. w00t.
*/
test("one observes ten thousand that observe one", function(t) {
gc()
var a = observable.box(2)
// many observers that listen to one..
var observers = []
for (var i = 0; i < 10000; i++) {
;(function(idx) {
observers.push(
computed(function() {
return a.get() * idx
})
)
})(i)
}
var bCalcs = 0
// one observers that listens to many..
var b = computed(function() {
var res = 0
for (var i = 0; i < observers.length; i++) res += observers[i].get()
bCalcs += 1
return res
})
var start = now()
mobx.observe(b, voidObserver, true) // start observers
t.equal(99990000, b.get())
var initial = now()
a.set(3)
t.equal(149985000, b.get()) // yes, I verified ;-).
//t.equal(2, bCalcs);
var end = now()
log(
"One observers many observes one - Started/Updated in " +
(initial - start) +
"/" +
(end - initial) +
" ms."
)
t.end()
})
test("five hundrend properties that observe their sibling", function(t) {
gc()
var observables = [observable.box(1)]
for (var i = 0; i < 500; i++) {
;(function(idx) {
observables.push(
computed(function() {
return observables[idx].get() + 1
})
)
})(i)
}
var start = now()
var last = observables[observables.length - 1]
mobx.observe(last, voidObserver)
t.equal(501, last.get())
var initial = now()
observables[0].set(2)
t.equal(502, last.get())
var end = now()
log(
"500 props observing sibling - Started/Updated in " +
(initial - start) +
"/" +
(end - initial) +
" ms."
)
t.end()
})
test("late dependency change", function(t) {
gc()
var values = []
for (var i = 0; i < 100; i++) values.push(observable.box(0))
var sum = computed(function() {
var sum = 0
for (var i = 0; i < 100; i++) sum += values[i].get()
return sum
})
mobx.observe(sum, voidObserver, true)
var start = new Date()
for (var i = 0; i < 10000; i++) values[99].set(i)
t.equal(sum.get(), 9999)
log("Late dependency change - Updated in " + (new Date() - start) + "ms.")
t.end()
})
test("lots of unused computables", function(t) {
gc()
var a = observable.box(1)
// many observers that listen to one..
var observers = []
for (var i = 0; i < 10000; i++) {
;(function(idx) {
observers.push(
computed(function() {
return a.get() * idx
})
)
})(i)
}
// one observers that listens to many..
var b = computed(function() {
var res = 0
for (var i = 0; i < observers.length; i++) res += observers[i].get()
return res
})
var sum = 0
var subscription = mobx.observe(
b,
function(e) {
sum = e.newValue
},
true
)
t.equal(sum, 49995000)
// unsubscribe, nobody should listen to a() now!
subscription()
var start = now()
a.set(3)
t.equal(sum, 49995000) // unchanged!
var end = now()
log("Unused computables - Updated in " + (end - start) + " ms.")
t.end()
})
test("many unreferenced observables", function(t) {
gc()
var a = observable.box(3)
var b = observable.box(6)
var c = observable.box(7)
var d = computed(function() {
return a.get() * b.get() * c.get()
})
t.equal(d.get(), 126)
t.equal(d.dependenciesState, -1)
var start = now()
for (var i = 0; i < 10000; i++) {
c.set(i)
d.get()
}
var end = now()
log("Unused observables - Updated in " + (end - start) + " ms.")
t.end()
})
test("array reduce", function(t) {
gc()
var aCalc = 0
var ar = observable([])
var b = observable.box(1)
var sum = computed(function() {
aCalc++
return ar.reduce(function(a, c) {
return a + c * b.get()
}, 0)
})
mobx.observe(sum, voidObserver)
var start = now()
for (var i = 0; i < 1000; i++) ar.push(i)
t.equal(499500, sum.get())
t.equal(1001, aCalc)
aCalc = 0
var initial = now()
for (var i = 0; i < 1000; i++) ar[i] = ar[i] * 2
b.set(2)
t.equal(1998000, sum.get())
t.equal(1000, aCalc)
var end = now()
log("Array reduce - Started/Updated in " + (initial - start) + "/" + (end - initial) + " ms.")
t.end()
})
test("array classic loop", function(t) {
gc()
var ar = observable([])
var aCalc = 0
var b = observable.box(1)
var sum = computed(function() {
var s = 0
aCalc++
for (var i = 0; i < ar.length; i++) s += ar[i] * b.get()
return s
})
mobx.observe(sum, voidObserver, true) // calculate
var start = now()
t.equal(1, aCalc)
for (var i = 0; i < 1000; i++) ar.push(i)
t.equal(499500, sum.get())
t.equal(1001, aCalc)
var initial = now()
aCalc = 0
for (var i = 0; i < 1000; i++) ar[i] = ar[i] * 2
b.set(2)
t.equal(1998000, sum.get())
t.equal(1000, aCalc)
var end = now()
log("Array loop - Started/Updated in " + (initial - start) + "/" + (end - initial) + " ms.")
t.end()
})
function order_system_helper(t, usebatch, keepObserving) {
gc()
t.equal(mobx._isComputingDerivation(), false)
var orders = observable([])
var vat = observable.box(2)
var totalAmount = computed(function() {
var sum = 0,
l = orders.length
for (var i = 0; i < l; i++) sum += orders[i].total.get()
return sum
})
function OrderLine(order, price, amount) {
this.price = observable.box(price)
this.amount = observable.box(amount)
this.total = computed(
function() {
return order.vat.get() * this.price.get() * this.amount.get()
},
{ context: this }
)
}
function Order(includeVat) {
this.includeVat = observable.box(includeVat)
this.lines = observable([])
this.vat = computed(
function() {
if (this.includeVat.get()) return vat.get()
return 1
},
{ context: this }
)
this.total = computed(
function() {
return this.lines.reduce(function(acc, order) {
return acc + order.total.get()
}, 0)
},
{ context: this }
)
}
var disp
if (keepObserving) disp = mobx.observe(totalAmount, voidObserver)
var start = now()
function setup() {
for (var i = 0; i < 100; i++) {
var c = new Order(i % 2 == 0)
orders.push(c)
for (var j = 0; j < 100; j++) c.lines.unshift(new OrderLine(c, 5, 5))
}
}
if (usebatch) mobx.transaction(setup)
else setup()
t.equal(totalAmount.get(), 375000)
var initial = now()
function update() {
for (var i = 0; i < 50; i++) orders[i].includeVat.set(!orders[i].includeVat.get())
vat.set(3)
}
if (usebatch) mobx.transaction(update)
else update()
t.equal(totalAmount.get(), 500000)
if (keepObserving) disp()
var end = now()
log(
"Order system batched: " +
usebatch +
" tracked: " +
keepObserving +
" Started/Updated in " +
(initial - start) +
"/" +
(end - initial) +
" ms."
)
t.end()
}
test("order system observed", function(t) {
order_system_helper(t, false, true)
})
test("order system batched observed", function(t) {
order_system_helper(t, true, true)
})
test("order system lazy", function(t) {
order_system_helper(t, false, false)
})
test("order system batched lazy", function(t) {
order_system_helper(t, true, false)
})
test("create array", function(t) {
gc()
var a = []
for (var i = 0; i < 1000; i++) a.push(i)
var start = now()
for (var i = 0; i < 1000; i++) observable.array(a)
log("\nCreate array - Created in " + (now() - start) + "ms.")
t.end()
})
test("create array (fast)", function(t) {
gc()
var a = []
for (var i = 0; i < 1000; i++) a.push(i)
var start = now()
for (var i = 0; i < 1000; i++) mobx.observable.array(a, { deep: false })
log("\nCreate array (non-recursive) Created in " + (now() - start) + "ms.")
t.end()
})
test("observe and dispose", t => {
gc()
var start = now()
var a = mobx.observable.box(1)
var observers = []
var MAX = 50000
for (var i = 0; i < MAX * 2; i++) observers.push(mobx.autorun(() => a.get()))
a.set(2)
// favorable order
// + unfavorable order
for (var i = 0; i < MAX; i++) {
observers[i]()
observers[observers.length - 1 - i]()
}
log("Observable with many observers + dispose: " + (now() - start) + "ms")
t.end()
})
test("sort", t => {
gc()
function Item(a, b, c) {
mobx.extendObservable(this, {
a: a,
b: b,
c: c,
get d() {
return this.a + this.b + this.c
}
})
}
var items = mobx.observable([])
function sortFn(l, r) {
items.length // screw all optimizations!
l.d
r.d
if (l.a > r.a) return 1
if (l.a < r.a) return -1
if (l.b > r.b) return 1
if (l.b < r.b) return -1
if (l.c > r.c) return 1
if (l.c < r.c) return -1
return 0
}
var sorted = mobx.computed(() => {
items.slice().sort(sortFn)
})
var start = now()
var MAX = 100000
var ar = mobx.autorun(() => sorted.get())
mobx.transaction(() => {
for (var i = 0; i < MAX; i++) items.push(new Item(i % 10, i % 3, i % 7))
})
log("expensive sort: created " + (now() - start))
var start = now()
for (var i = 0; i < 5; i++) {
items[i * 1000].a = 7
items[i * 1100].b = 5
items[i * 1200].c = 9
}
log("expensive sort: updated " + (now() - start))
var start = now()
ar()
log("expensive sort: disposed" + (now() - start))
var plain = mobx.toJS(items, false)
t.equal(plain.length, MAX)
var start = now()
for (var i = 0; i < 5; i++) {
plain[i * 1000].a = 7
plain.sort(sortFn)
plain[i * 1100].b = 5
plain.sort(sortFn)
plain[i * 1200].c = 9
plain.sort(sortFn)
}
log("native plain sort: updated " + (now() - start))
t.end()
})
test("computed temporary memoization", t => {
"use strict"
gc()
var computeds = []
for (let i = 0; i < 40; i++) {
computeds.push(
mobx.computed(() => (i ? computeds[i - 1].get() + computeds[i - 1].get() : 1))
)
}
var start = now()
t.equal(computeds[27].get(), 134217728)
log("computed memoization " + (now() - start) + "ms")
t.end()
})
test("Map: initializing", function(t) {
gc()
var iterationsCount = 100000
var map
var i
var start = Date.now()
for (i = 0; i < iterationsCount; i++) {
map = mobx.observable.map()
}
var end = Date.now()
log("Initilizing " + iterationsCount + " maps: " + (end - start) + " ms.")
t.end()
})
test("Map: looking up properties", function(t) {
gc()
var iterationsCount = 1000
var propertiesCount = 100
var map = mobx.observable.map()
var i
var p
for (p = 0; p < propertiesCount; p++) {
map.set("" + p, p)
}
var start = Date.now()
for (i = 0; i < iterationsCount; i++) {
for (p = 0; p < propertiesCount; p++) {
map.get("" + p)
}
}
var end = Date.now()
log(
"Looking up " +
propertiesCount +
" map properties " +
iterationsCount +
" times: " +
(end - start) +
" ms."
)
t.end()
})
test("Map: setting and deleting properties", function(t) {
gc()
var iterationsCount = 1000
var propertiesCount = 100
var map = mobx.observable.map()
var i
var p
var start = Date.now()
for (i = 0; i < iterationsCount; i++) {
for (p = 0; p < propertiesCount; p++) {
map.set("" + p, i)
}
for (p = 0; p < propertiesCount; p++) {
map.delete("" + p, i)
}
}
var end = Date.now()
log(
"Setting and deleting " +
propertiesCount +
" map properties " +
iterationsCount +
" times: " +
(end - start) +
" ms."
)
t.end()
})
function now() {
return +new Date()
}