Question

我正在尝试制作更节省内存的素数生成器。我不能想到比使用文件作为我的素数数组更好的东西，并且可以同步逐行读取。我运行它并在大约29000它给我ENFILE: File table overflow错误。有任何修改/改进此代码的想法吗？

#!/usr/bin/env node

var num = 3,
    prime,
    fs = require("fs"),
    readline = require("./line_reader.js");

console.log("Hundreds: 2");
console.log("Hundreds: 3");

function appendPrime (num) {
  fs.appendFileSync("Primes.txt", num+'\n');
}

while (true) {
  prime = true;
  var times = Math.floor(Math.pow(num, 0.5));
  if (num % 2 == 0 || num % 3 == 0) {
    prime = false;
  } else {
    readline.eachLine("Primes.txt", function (line, last, cb) {
      if (num % line == 0) {
        prime = false;
        cb(true);
      } else {
        cb();
      }
    });
  }
  if (prime) {
    var place = String(num).length;
    switch (true) {
      case place <= 3:
        console.log("Hundreds: "+num);
      break;
      case place <= 5 :
        console.log("Thousands: "+num);
      break;
      case 6 :
        console.log("Hundred thousands: "+num);
      break;
      case place <= 8 :
        console.log("Millions: "+num);
      break;
      case 9 :
        console.log("Hundred millions: "+num);
      break;
      case place >= 10 :
        console.log("Billions or above: "+num);
      break;
    }
    appendPrime(num);
  }
  num += 2;
}

Answer 1

试试这个

sudo launchctl limit maxfiles 16384 16384 && ulimit -n 16384

ENFILE：文件表溢出Node.js

1 个答案: