Patrick Schmidt cdd817edf9 Improve S3 request signing performance ...

This change is caching HMAC hashers for repeated use in subsequent
requests and chunks, so they don't have to be initialized from
scratch every time.
On my local computer this gives me ~5-6 times faster signature
calculation and ~5-6.5% more throughput in S3 requests. The smaller
the payload the better the throughput gets.

2023-09-05 10:33:27 -07:00

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