Node.js Performance Comparison Between SHA-512 and SHA-256

outputs.txt

# MacBook Pro (Mid 2015) - 2.5 GHz Intel Core i7
# Node.js v9.2.0

block size: 8192
  hashing sha512 x 300000 times: 4447ms
  hashing sha256 x 300000 times: 6105ms
  difference: 27.158067158067155 %
  
block size: 4096
  hashing sha512 x 300000 times: 2601ms
  hashing sha256 x 300000 times: 3426ms
  difference: 24.080560420315237 %
  
block size: 1024
  hashing sha512 x 300000 times: 1218ms
  hashing sha256 x 300000 times: 1434ms
  difference: 15.062761506276146 %
  
block size: 512
  hashing sha512 x 300000 times: 970ms
  hashing sha256 x 300000 times: 1102ms
  difference: 11.97822141560799 %

pgraph.png

script.js

const crypto = require('crypto');

measureBlock(8192);
measureBlock(4096);
measureBlock(1024);
measureBlock(512);

function measureBlock(blockSize) {
  const block = crypto.randomBytes(blockSize);

  console.log('block size:', blockSize);

  const a = measureHash(block, 'sha512');
  const b = measureHash(block, 'sha256');

  console.log(`  difference: ${100 - 100 * a / b} %`);
}

function measureHash(block, hashAlgorithm) {
  const iterations = 30e4;
  const begin = Date.now();

  for (let i = 0; i < iterations; i += 1) {
    crypto
      .createHash(hashAlgorithm)
      .update(block)
      .digest();
  }

  const end = Date.now();
  const diff = end - begin;

  console.log(`  hashing ${hashAlgorithm} x ${iterations} times: ${diff}ms`);

  return diff;
}
const crypto = require('crypto');

measureBlock(8192);
measureBlock(4096);
measureBlock(1024);
measureBlock(512);

function measureBlock(blockSize) {
  const block = crypto.randomBytes(blockSize);

  console.log('block size:', blockSize);

  const a = measureHash(block, 'sha512');
  const b = measureHash(block, 'sha256');

  console.log(`  difference: ${100 - 100 * a / b} %`);
}

function measureHash(block, hashAlgorithm) {
  const iterations = 30e4;
  const begin = Date.now();

  for (let i = 0; i < iterations; i += 1) {
    crypto
      .createHash(hashAlgorithm)
      .update(block)
      .digest();
  }

  const end = Date.now();
  const diff = end - begin;

  console.log(`  hashing ${hashAlgorithm} x ${iterations} times: ${diff}ms`);

  return diff;
}