SMRTR ProgrammingDec 1, 2025lobste.rs

Learning Rust: Download and deserialize 10 000 files in 9.833 seconds

SMRTR summary

A developer built a Rust application that downloads and processes 10,000 CSV files from Amazon S3 in under 10 seconds using async concurrency with semaphores. The solution combines task buffering with semaphore-based resource management to efficiently handle S3 API calls and CSV deserialization, demonstrating Rust's fearless concurrency capabilities on a single thread.

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