我想知道以下代码是否会导致对象i中的整数context具有无效值。到目前为止，我无法在实验中引起任何问题。

// Node.js (v10.19.0)

const Promise = require('promise')

// object accessed from different async processes in parallel
let context = {i: 0}

// create async functions
let funkMaker = function(i) { 
  return async function(context) { 
    context.i += 1; 
    console.log(`Funk${i} at ${Date.now()}: Incremented argument 'context.i' to: ${context.i}`); 
    return context.i 
  } 
}

// create async processes
let funksArr = []; 
for (k=1; k<101; k++) { 
  funksArr.push(funkMaker(k)) 
}

// invoke async processes in parallel
Promise.all(
  funksArr.map(f => f(context))
).then(
  x => console.log(`Promise.all resolved with ${x}`)
).catch(
  e => console.log(`Promise.all raised an error:\n${e}`)
)

上面的代码产生以下输出（摘录）：

Funk1 at 1584448782621: Incremented argument 'context.i' to: 1   
Funk2 at 1584448782621: Incremented argument 'context.i' to: 2   
Funk3 at 1584448782622: Incremented argument 'context.i' to: 3   
Funk4 at 1584448782622: Incremented argument 'context.i' to: 4   
Funk5 at 1584448782622: Incremented argument 'context.i' to: 5   
Funk6 at 1584448782622: Incremented argument 'context.i' to: 6   
Funk7 at 1584448782622: Incremented argument 'context.i' to: 7    
Funk8 at 1584448782622: Incremented argument 'context.i' to: 8  
Funk9 at 1584448782622: Incremented argument 'context.i' to: 9

正如您所看到的，似乎有几个进程在同一毫秒（上述context.i至Funk3）访问Funk9。我对为什么整数context.i仍然正确地递增且没有错误感到困惑。

非常欢迎有识之士。谢谢！

更新

为了在真实的系统线程中进行尝试，我调整了从this blog post窃取的代码，该代码使用crypto和隐式libuv在真实线程中执行。我仍然无法中断context.i。老实说，我还是很困惑。

const crypto = require("crypto");
const start = Date.now();

let context = {i: 0}

function logHashTime(context) {
  crypto.pbkdf2("a","b",100000,512,"sha512",() => {
    context.i += 1;
    console.log(`Hash: ${Date.now() - start},'context.i' incremented to: ${context.i}`);
  });
}

for (i = 0; i < 100; i++) {
  logHashTime(context)
}

输出（摘录）仍然是“精细”：

Hash: 1268,'context.i' incremented to: 1  
Hash: 1460,'context.i' incremented to: 2  
Hash: 1660,'context.i' incremented to: 3  
Hash: 1907,'context.i' incremented to: 4  
Hash: 2493,'context.i' incremented to: 5  
Hash: 2673,'context.i' incremented to: 6  
Hash: 3154,'context.i' incremented to: 7  
Hash: 3215,'context.i' incremented to: 8  
Hash: 3662,'context.i' incremented to: 9