How I Built Streaming ZIP64 on Cloudflare Workers (128MB RAM, No Filesystem)

This article details a serverless architecture for creating large ZIP archives from remote URLs using Cloudflare Workers and R2 storage. It avoids traditional limitations like memory constraints by streaming data directly to cloud storage, checkpointing state periodically, and resuming operations after failures. The system has processed over 550K files totaling 10TB of data with no egress fees and peak memory usage under 128MB regardless of job size.

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