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Parsing Large JSON Responses in Python Using asyncio and aiohttp Results in MemoryError

๐Ÿ‘€ Views: 0 ๐Ÿ’ฌ Answers: 1 ๐Ÿ“… Created: 2025-06-13
python json aiohttp asyncio Python

I'm relatively new to this, so bear with me... I'm stuck on something that should probably be simple. I tried several approaches but none seem to work. I'm working on a Python application that fetches a large JSON dataset from an API using `aiohttp` for asynchronous requests. However, when the response size exceeds a certain threshold (around 10MB), I encounter a `MemoryError`. I suspect it has to do with how I'm processing the JSON data. Hereโ€™s the relevant part of my code: ```python import aiohttp import asyncio async def fetch_json(url): async with aiohttp.ClientSession() as session: async with session.get(url) as response: return await response.json() async def main(): url = 'https://example.com/api/large-data' data = await fetch_json(url) # Additional processing here if __name__ == '__main__': asyncio.run(main()) ``` Iโ€™ve tried switching to `response.text()` and then parsing it with `json.loads()`, but I face the same scenario. The scenario seems to occur during the JSON decoding phase. My system has 8GB of RAM, and I noticed that the memory usage spikes just before the `MemoryError` is thrown. I also tried increasing the swap space on my machine, but that didnโ€™t help either. Is there a more memory-efficient way to handle large JSON responses in this setup? Iโ€™m currently using Python 3.9.1 and aiohttp 3.7.4. Any suggestions would be greatly appreciated! For context: I'm using Python on Debian. Any help would be greatly appreciated! The stack includes Python and several other technologies. Hoping someone can shed some light on this. For reference, this is a production web app. Any feedback is welcome!