How Can Transactions Significantly Speed Up MySQLi INSERT Operations with Multiple Values?

Efficient and Secure INSERT Operations in MySQLi with Multiple Values

Inserting large volumes of data into a database can be a performance challenge, especially when it comes to maintaining security against SQL injection attacks. PHP and MySQLi provide various approaches to tackle this issue while ensuring data integrity.

The provided code uses a straightforward approach of preparing and binding parameters within a loop for each value in the array. However, this method can encounter performance issues for large datasets due to the repetitive process.

A recommended technique is to leverage transactions. A transaction groups multiple operations into a single unit, ensuring that they are all applied or none at all. By enclosing the insert queries within a transaction, as shown in the optimized code:

$mysqli->query("START TRANSACTION");
foreach ($array as $one) {
    $stmt->execute();
}
$mysqli->query("COMMIT");

we can gain significant performance improvements. Transactions reduce the overhead of executing each query individually, resulting in faster execution times.

Moreover, the optimized code minimizes the number of calls to prepare() and bind_param() by performing these operations outside the loop. This further reduces the processing time.

Performance Test Results

To demonstrate the effectiveness of these optimizations, a test was conducted with 10,000 iterations on a web server. The results were:

• Without transaction: 226 seconds.
• With transaction: 2 seconds.

The use of transactions resulted in a two order of magnitude speed increase, showcasing its potential for improved performance when dealing with large datasets.

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