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How to Process Multi-Gigabyte JSON Files in Python: Memory-Efficient Techniques That Work

  • Python offers efficient tools for processing large JSON files without overwhelming system resources.
  • Using libraries like ijson for stream processing enables incremental parsing of large JSON datasets.
  • Line-by-line processing is effective for newline-delimited JSON files, such as log entries.
  • Memory-mapped files provide fast random access to specific parts of JSON files.
  • Chunked processing divides files into manageable parts, optimizing memory usage for database operations.
  • Working with compressed JSON files reduces disk I/O and memory usage while maintaining fast access.
  • JSON Path expressions allow targeted data extraction from complex JSON structures.
  • Parallel processing on multi-core machines significantly accelerates data processing.
  • Combining techniques like streaming, batching, and parallel processing enhances efficiency for processing massive datasets.
  • Generator functions are recommended for transforming large datasets with minimal memory consumption.

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