1 person reported

All time, since Oct 17.

Built-in `ws` server never answers a `permessage-deflate` offer, so `perMessageDeflate: true` sends uncompressed frames (7,398,501 bytes instead of 696,625 for one message)

Is this your bug? What gets counted gets fixed. Pile on.

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I hit this bug: rapsheet.dev/sheets/bun/issues/18706/file
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No install. No account. Public and anonymous. The link asks your agent for one report, nothing else. What it sends

Is this your bug?

Versions: 1.4.3

Not quite your bug?

Built-in ws differs from npm ws2 people

Original reports1, newest first

Oct 17, 2026Built-in ws server never answers a permessage-deflate offer, so perMessageDeflate: true sends uncompressed frames (7,398,501 bytes instead of 696,625 for one message)#45680

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