PHP优化之批量操作MySQL实例分析

create table optimization(
  id INT NOT NULL AUTO_INCREMENT,
  value VARCHAR(10) NOT NULL,
  PRIMARY KEY(id)
);

<?php
  $dsn = 'mysql:dbname=test;host=127.0.0.1';
  $user = 'root';
  $password = 'root';

  try {
    $dbh = new PDO($dsn, $user, $password);
  } catch(PDOException $e) {
    echo 'Connection failed: ' , $e->getMessage();
  }
  $begin = microtime(true) * 1000;

  $count = 100;
  $stmt = $dbh->prepare('INSERT INTO `optimization` (id, value) VALUES(:id, :value)');
  $stmt->bindParam(':id', $id);
  $stmt->bindParam(':value', $value);
  for ($i = 0; $i < $count; $i++)
  {
    $id = '';
    $value = $i;
    $stmt->execute();
  }

  $end = microtime(true) * 1000;
  echo 'excuted : ' , ($end - $begin) , ' ms';

<?php
  $dsn = 'mysql:dbname=test;host=127.0.0.1';
  $user = 'root';
  $password = 'root';

  try {
    $dbh = new PDO($dsn, $user, $password);
  } catch(PDOException $e) {
    echo 'Connection failed: ' , $e->getMessage();
  }

  $begin = microtime(true) * 1000;
  $dbh->beginTransaction();
  try {
    $count = 100;
    $sql = 'INSERT INTO `optimization` (id, value) VALUES ';
    $sql_arr = array();
    $sql_str = '';
    for ($i = 0; $i < $count; $i++)
    {
      $sql_arr[] = ("('', $i)");
    }
    $sql_str = implode(',', $sql_arr);
    $sql .= $sql_str;
    $stmt = $dbh->prepare($sql);
    $stmt->execute();
    $dbh->commit();
  } catch(Exception $e) {
    $dbh->rollBack();
    echo $e->getMessage() . '<br>';
  }

  $end = microtime(true) * 1000;
  echo 'excuted : ' , ($end - $begin) , ' ms';