Line Count Benchmark

README.md

Line Count Benchmark

Simple linecount example to benchmark io performance in Java, NodeJS & Go.

Sample Execution

$ ./run-benchmark.sh
[    Go] Counted 12319840 lines in 2.5675134s
[  Java] Counted 12319840 in 4303 ms
[NodeJS] Counted 12319840 in 4612 ms

line-count.go

package main

import (
  "bufio"
  "time"
  "os"
  "fmt"
)


func lineCount(filename string) int {
  count := 0
  inFile, err := os.Open(filename)
  if err != nil {
    fmt.Println(err)
    return count
  }
  defer inFile.Close()
  scanner := bufio.NewScanner(inFile)
  for scanner.Scan() {
    count++
  }
  return count
}

func main() {
	var filename string
	if len(os.Args) > 2 {
		filename = os.Args[3]
	} else {
		filename = "csv/order-details-filtered.csv"
	}
  start := time.Now()
  count := lineCount(filename)
  end := time.Now()
  duration := end.Sub(start)
  fmt.Printf("[    Go] Counted %d lines in %s\n", count, duration.String())
}

line-count.js

var fs = require('fs');
var i;
var count = 0;
var filename = process.argv.length < 3 ? 'csv/order-details-filtered.csv' : process.argv[2];
var nl = '\n'.charCodeAt(0);
var start = new Date().getTime();
fs.createReadStream(filename)
  .on('data', function(chunk) {
    for (i=0; i < chunk.length; ++i)
      if (chunk[i] == nl) count++;
  })
  .on('end', function() {
    console.log('[NodeJS] Counted %d in %d ms', count, new Date().getTime() - start);
  });

LineCount.java

import java.io.BufferedReader;
import java.io.FileReader;


public class LineCount {
  public static void main(String[] args) throws Exception {
    String filename = "csv/order-details-filtered.csv";
    if ( args.length > 2 ) {
      filename = args[2];
    }
    try ( BufferedReader br = new BufferedReader(new FileReader(filename)) ) {
      int count = 0;
      long start = System.currentTimeMillis();
      while ( br.readLine() != null ) {
        count++;
      }
      System.out.printf("[  Java] Counted %d in %d ms\n", count, System.currentTimeMillis() - start);
    }
  }
}

run-benchmark.sh

#!/bin/sh

rm -f line-count.exe LineCount.class
go build line-count.go
javac LineCount.java

node line-count.js &
java LineCount &
./line-count.exe & 

sleep 5