Fib 测试代码
凹语言的优点可以通过一个简单的 Fibonacci 示例来说明。下面是凹语言和 Go 两种语言中实现的 fib 函数。
凹语言代码:
func init {
println(fib(46))
}
func fib(n: int) => int {
aux: func(n, acc1, acc2: int) => int
aux = func(n, acc1, acc2: int) => int {
switch n {
case 0:
return acc1
case 1:
return acc2
default:
return aux(n-1, acc2, acc1+acc2)
}
}
return aux(n, 0, 1)
}
Go 代码:
package main
func main() {
println(fib(46))
}
func fib(n int) int {
var aux func(n, acc1, acc2 int) int
aux = func(n, acc1, acc2 int) int {
switch n {
case 0:
return acc1
case 1:
return acc2
default:
return aux(n-1, acc2, acc1+acc2)
}
}
return aux(n, 0, 1)
}
测试结果
执行 make 输出结果如下：
$ make
wa -v
Wa version v0.17.0
go version
go version go1.21.0 darwin/amd64
wasmer -V
wasmer 4.3.7
wa build -optimize -target=wasi -output=fib_wa.wasm fib_wa.wa
GOOS=wasip1 GOARCH=wasm go build -o fib_go.wasm
du -sh fib_*.wasm
1.3M fib_go.wasm
12K fib_wa.wasm
time wasmer fib_wa.wasm
1836311903
0.12 real 0.02 user 0.03 sys
time wasmer fib_go.wasm
1836311903
0.26 real 0.04 user 0.05 sys
总结
原文: https://wa-lang.org/smalltalk/st0051.html
