mac 上asm wasm js 性能对比

以js作为速度单位, 按照计算时间的比值

基于c的wasm 速度是js的2.3倍左右

asm的wasm速度是1.6左右

 

对比代码

const fs = require("fs");
const Module = require('./a.out')

const loader = require("@assemblyscript/loader");
const imports = { /* imports go here */ };
const wasmModule = loader.instantiateSync(fs.readFileSync(__dirname + "/build/optimized.wasm"), imports);
// const wasmModule = loader.instantiateSync("./build/optimized.wasm", imports);
const fibAsm = wasmModule.exports.fibAsm;
// fibWasm = Module.cwrap('fibWasm', 'number', ['number']);

const fibJs = n => n < 2 ? n : fibJs(n - 1) + fibJs(n - 2)


Module.onRuntimeInitialized = () => {
    const fibWasm = Module.cwrap('fibWasm', 'number', ['number']);
    console.log('fibWasm', fibWasm(12));

    for (let i = 0; i < 10; i++) {
        console.log(i, 'js asm cpp', fibJs(i), fibAsm(i), fibWasm(i))
    }


    const size = 40
    let st = + new Date()
    for (let i = 0; i < size; i++)
        fibJs(i)
    const jsTime = +new Date() - st
    console.log('js', jsTime)
    st = + new Date()
    for (let i = 0; i < size; i++)
        fibAsm(i)
    const asmTime = +new Date() - st
    console.log('fibAsm', asmTime, asmTime / jsTime, jsTime / asmTime)

    st = + new Date()
    for (let i = 0; i < size; i++)
        fibWasm(i)
    const wasmTime = +new Date() - st
    console.log('wasm', wasmTime, wasmTime / jsTime, jsTime / wasmTime)
};

 

来源：oschina

链接：https://my.oschina.net/ahaoboy/blog/4478724