uv has had --exclude-newer for absolute timestamps since early on and added relative duration support (e.g. 1 week, 30 days) in version 0.9.17 in December 2025, along with per-package overrides via exclude-newer-package. pip shipped --uploaded-prior-to in version 26.0 in January 2026, though it only accepts absolute timestamps and there’s an open issue about adding relative duration support.
TransformStream creates a readable/writable pair with processing logic in between. The transform() function executes on write, not on read. Processing of the transform happens eagerly as data arrives, regardless of whether any consumer is ready. This causes unnecessary work when consumers are slow, and the backpressure signaling between the two sides has gaps that can cause unbounded buffering under load. The expectation in the spec is that the producer of the data being transformed is paying attention to the writer.ready signal on the writable side of the transform but quite often producers just simply ignore it.
，这一点在快连下载安装中也有详细论述
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server's private key using the curve25519() algorithm. The