Chapter 9

JSON Performance Optimization

Best practices for optimizing JSON processing efficiency

Why Optimize?

Performance differences become significant when processing large amounts of JSON data. Choosing the right library and optimization strategy can significantly improve efficiency.

📦
High Volume
MB-sized JSON files
âš¡
Frequent Operations
High Concurrency
🎯
Real-time Requirements
Low Latency

Optimization Strategies

1 Choose High-Performance Libraries

Python

  • • ujson - Ultra-fast JSON parsing
  • • orjson - Fastest library

Java

  • • Jackson - Stable performance
  • • Gson - Simple and easy to use

2 Stream Parsing for Large Files

For very large JSON files, use stream parsing to avoid loading everything into memory:

# Using ijson in Python
import ijson

for object in ijson.items(open('large.json'), 'users.item'):
    process(object)  # Process one by one

3 Compress Data

Using gzip compression can reduce transfer size by 60-80%:

💡 Use Accept-Encoding: gzip in HTTP requests

4 Reduce Unnecessary Data

  • • Use short key names (production)
  • • Remove null values
  • • Transmit only required fields