// 压测：循环、递归、闭包

fn fib(n) {
    if (n <= 1) {
        return n
    }
    return fib(n - 1) + fib(n - 2)
}

fn make_adder(x) {
    return fn(y) { return x + y }
}

let t0 = clock()

// 1. 循环压测：100万次算术
let sum = 0
let i = 0
while (i < 1000000) {
    sum = sum + i
    i = i + 1
}
print("loop 1M:", sum)

// 2. 递归压测：fib(25)
let f = fib(25)
print("fib(25):", f)

// 3. 闭包压测：100万次调用
let add10 = make_adder(10)
let j = 0
let total = 0
while (j < 1000000) {
    total = add10(j)
    j = j + 1
}
print("closure 1M calls:", total)

let t1 = clock()
print("total time (s):", t1 - t0)