rpf5573

console.log('start');
const fs = require('fs');
var data = '';
fs.readFile('test.txt', (err, result) => {
  if (err) {
    throw err;
  } else {
    console.log('complete now')
    data = result;
  }

rpf5573

console.log('start');
const fs = require('fs');
const data = fs.readFileSync('test.txt');
console.log('end');

# output
# -------
# start
# end

rpf5573

// src/node_main.cc : 94
int main(int argc, char* argv[]) {
  ~~~
  return node::Start(argc, argv);
}

rpf5573

// 시작은 main 함수!

// src/node_main.cc : 94
int main(int argc, char* argv[]) {
  return node::Start(argc, argv);
}


// src/node.cc : 3036
int Start(int argc, char** argv) {

rpf5573

// loader.js를 실행하고 나서, node.js를 실행하는데, node.js안에서는 이렇게 함수가 호출되어있다. 
// 즉, loader.js에서 load에 필요한 함수들을 정의한 뒤에, node.js에서 그걸 사용하면서 실제로 load를 진행한다.
startup();

// lib/internal/bootstrap/node.js : 31
function startup() {
  // Make process.argv[1] into a full path.
  const path = NativeModule.require('path');
  process.argv[1] = path.resolve(process.argv[1]);

rpf5573

const crypto = require('crypto');

const start = Date.now();
crypto.pbkdf2( 'a', 'b', 100000, 512, 'sha512', () => {
  console.log( '1:', Date.now() - start );
});


// output
// 1: 1036

rpf5573

const crypto = require('crypto');

const start = Date.now();
crypto.pbkdf2( 'a', 'b', 100000, 512, 'sha512', () => {
  console.log( '1:', Date.now() - start );
});

crypto.pbkdf2( 'a', 'b', 100000, 512, 'sha512', () => {
  console.log( '2:', Date.now() - start );
});

rpf5573

const crypto = require('crypto');

const start = Date.now();
crypto.pbkdf2( 'a', 'b', 100000, 512, 'sha512', () => {
  console.log( '1:', Date.now() - start );
});

crypto.pbkdf2( 'a', 'b', 100000, 512, 'sha512', () => {
  console.log( '2:', Date.now() - start );
});

rpf5573

const crypto = require('crypto');

const start = Date.now();
crypto.pbkdf2( 'a', 'b', 100000, 512, 'sha512', () => {
  console.log( '1:', Date.now() - start );
});

crypto.pbkdf2( 'a', 'b', 100000, 512, 'sha512', () => {
  console.log( '2:', Date.now() - start );
});

rpf5573

process.env.UV_THREADPOOL_SIZE = 2;

const crypto = require('crypto');

const start = Date.now();
crypto.pbkdf2( 'a', 'b', 100000, 512, 'sha512', () => {
  console.log( '1:', Date.now() - start );
});

crypto.pbkdf2( 'a', 'b', 100000, 512, 'sha512', () => {