Скачать или смотреть Boosting File Upload Performance in PHP with Native SFTP and fwrite Functionality

Discover how to enhance the performance of file uploads to SFTP servers in PHP using optimized chunk sizes for improved speed and efficiency.
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How to Increase the Performance of File Uploads Using Native SFTP Functions and fwrite in PHP

Uploading large files can often be a cumbersome process, particularly when working with SFTP servers. If you've been frustrated by the slow upload speeds of substantial files—like a 500MB file—it could be time to tweak your current approach. In this guide, we’ll explore how to maximize your file upload performance with some key PHP functions.

The Problem

A user recently faced issues uploading a large 500MB file to an SFTP server with a disappointing speed of around 8 MiB/s. The code utilized native SFTP functions and the fwrite method but still struggled with performance. The user further found that while file uploads via CURL worked flawlessly, the same could not be said for their SFTP upload method.

This inconsistency can become extremely frustrating, especially when dealing with production environments like Google Cloud Run.

Understanding the Solution

The core issue in the user's code stemmed from the fundamental operation of the fwrite function. Although 32MB was read from the source file for writing, fwrite processed data in much smaller chunks (a few kilobytes), leading to a bottleneck in performance.

To tackle this, we can optimize our chunk sizes when uploading files via SFTP, allowing the script to handle more substantial blocks of data at once. This minimizes the overhead of multiple write operations, particularly over a high-latency connection.

Step-by-Step Optimization

Here’s how to implement a solution that can enhance your file upload performance:

Set the Chunk Size:
Utilize the stream_set_chunk_size function to define a larger chunk size for the SFTP stream. In this case, we set it to 1MB.

[[See Video to Reveal this Text or Code Snippet]]

Adjust Your Writing Loop:
Make sure your writing loop reads and writes efficiently. Here’s the modified code:

[[See Video to Reveal this Text or Code Snippet]]

Conclusion

By implementing a larger chunk size within the SFTP stream, you can significantly improve the speed of file uploads. This adjustment allows your application to handle data more efficiently, especially when dealing with large files over high-latency networks.

In summary, the next time you face slow uploads to an SFTP server in PHP, remember to check your chunk sizes. With these adjustments, you should see a marked improvement in performance. Happy uploading!