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Jasnell.me. A blog about code and whatever else I might be thinking about.

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Blog 2 months ago
Contributions: Aug 16-23, 2026
8 merged, 8 in progress in workerd and node
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Blog 2 months ago
Hypothesis testing, EWMA, and portable histograms in Node.js
The Node.js histogram API gets Welch's t-test, Mann-Whitney U, EWMA for streaming stats, SLO burn rate tracking, and a CBOR-based export/import format.
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Blog 2 months ago
Making Node.js histograms more useful
The Node.js histogram API now has real statistical analysis. CDF, skewness, kurtosis, KS tests, coordinated omission correction, and snapshot diffing.
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Blog 2 months ago
Contributions: Aug 9-16, 2026
4 merged, 3 in progress in node and workerd
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Blog 2 months ago
Contributions: Aug 2-9, 2026
2 merged, 7 in progress in node and workerd
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News jasnell.me 3 months ago
HTTP Server API: A Draft Specification
A draft specification for a server-side HTTP API built on Fetch Standard types - ServerContext, tunnels, WebSocket, WebTransport, priority, error codes, and lifecycle management.
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Blog 3 months ago
HTTP Server API: A Draft Specification
A draft specification for a server-side HTTP API built on Fetch Standard types - ServerContext, tunnels, WebSocket, WebTransport, priority, error codes, and lifecycle management.
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News jasnell.me 3 months ago
Fetch Needs Error Codes
HTTP/2 and HTTP/3 have rich, typed error signaling that the Fetch API completely discards. The TC39 error code proposal could fix that.
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Blog 3 months ago
Fetch Needs Error Codes
HTTP/2 and HTTP/3 have rich, typed error signaling that the Fetch API completely discards. The TC39 error code proposal could fix that.
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Blog 3 months ago
Fetch Is Not Enough
The Fetch API gave JavaScript runtimes a shared vocabulary for HTTP. But HTTP has capabilities that Fetch can't express, and every runtime has diverged trying to work around the gaps.
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