erikfrey

/*
 * given a list of input leveldb's, merge them into a single output leveldb
 *
 */
#include <iostream>
#include <algorithm>

#include <boost/program_options.hpp>
#include <boost/cstdint.hpp>

erikfrey

#include <cstdlib>
#include <cstring>
#include <iostream>
#include <boost/array.hpp>
#include <boost/bind.hpp>
#include <boost/asio.hpp>

namespace posix = boost::asio::posix;

class echo_client

erikfrey

#include <cstdlib>
#include <cstring>
#include <iostream>
#include <boost/array.hpp>
#include <boost/bind.hpp>
#include <boost/asio.hpp>

namespace posix = boost::asio::posix;

class posix_chat_client

erikfrey

erik@roastbeef:~/proj$ time node child.js < bigfile > derp

real	0m6.176s
user	0m4.176s
sys	0m1.916s
erik@roastbeef:~/proj$ time cat bigfile | node child.js | cat > derp

real	0m1.504s
user	0m0.560s
sys	0m0.892s

erikfrey

erik@roastbeef:~/proj$ cat child2.js 
var readline = require('readline'),
  rl = readline.createInterface(process.stdin, process.stdout);

rl.on('line', function(line) {
  console.log(line);
});
erik@roastbeef:~/proj$ time node child2.js < bigfile > derp

erikfrey

erik@roastbeef:~/proj$ cat child.py 
import sys

line = sys.stdin.readline()
while line:
  line = sys.stdin.readline()
erik@roastbeef:~/proj$ time python child.py < bigfile > derp

real	0m0.073s
user	0m0.056s

erikfrey

>>> not None
True
>>> True is not None
True
>>> not not None
False
>>> False is not not None
  File "<stdin>", line 1
    False is not not None
                  ^

erikfrey

>>> not None
True
>>> True is not None
True
>>> not not None
False
>>> False is not not None
  File "<stdin>", line 1
    True is not not None
                  ^

erikfrey

>>> not None
True
>>> True is not None
True
>>> not not None
False
>>> True is not not None
  File "<stdin>", line 1
    True is not not None
                  ^

erikfrey

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