[v10.x] tls: group chunks into TLS segments #28904
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Correct docs to clarify that behaviour, and fix a race condition in test-http2-large-write-destroy.js. Fixes: nodejs#27863 PR-URL: nodejs#27891 Reviewed-By: Anna Henningsen <[email protected]> Reviewed-By: Ruben Bridgewater <[email protected]> Reviewed-By: Colin Ihrig <[email protected]> Reviewed-By: Rich Trott <[email protected]> Reviewed-By: Luigi Pinca <[email protected]>
PR-URL: nodejs#28903 Reviewed-By: Anna Henningsen <[email protected]> Reviewed-By: Rich Trott <[email protected]>
TLSWrap::DoWrite() now concatenates data chunks and makes a single call to SSL_write(). Grouping data into a single segment: - reduces network overhead: by factors of even 2 or 3 in usages like `http2` or `form-data` - improves security: segment lengths can reveal lots of info, i.e. with `form-data`, how many fields are sent and the approximate length of every individual field and its headers - reduces encryption overhead: a quick benchmark showed a ~30% CPU time decrease for an extreme case, see nodejs#27573 (comment) Fixes: nodejs#27573 PR-URL: nodejs#27861 Reviewed-By: Fedor Indutny <[email protected]> Reviewed-By: Anna Henningsen <[email protected]> Reviewed-By: Ujjwal Sharma <[email protected]> Reviewed-By: Rich Trott <[email protected]>
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Tests are passing. /ping @nodejs/backporters for reviews/landing |
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@nodejs/crypto |
bnoordhuis
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Aug 3, 2019
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Thanks, LGTM.
Instead I've defined it as
vector<char>which has almost identical API; are these changes okay for backports?
Ideally the delta between release lines is as small as possible. If it's not a gargantuan task to back-port the AllocatedBuffer API, then that's strongly preferred.
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Then I'll try to also backport #26207 and see if it works. |
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Thanks, at least you tried. I'm good with landing this PR as is. |
BethGriggs
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Oct 7, 2019
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Correct docs to clarify that behaviour, and fix a race condition in test-http2-large-write-destroy.js. Fixes: #27863 Backport-PR-URL: #28904 PR-URL: #27891 Reviewed-By: Anna Henningsen <[email protected]> Reviewed-By: Ruben Bridgewater <[email protected]> Reviewed-By: Colin Ihrig <[email protected]> Reviewed-By: Rich Trott <[email protected]> Reviewed-By: Luigi Pinca <[email protected]>
BethGriggs
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Oct 7, 2019
Backport-PR-URL: #28904 PR-URL: #28903 Reviewed-By: Anna Henningsen <[email protected]> Reviewed-By: Rich Trott <[email protected]>
BethGriggs
pushed a commit
that referenced
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Oct 7, 2019
TLSWrap::DoWrite() now concatenates data chunks and makes a single call to SSL_write(). Grouping data into a single segment: - reduces network overhead: by factors of even 2 or 3 in usages like `http2` or `form-data` - improves security: segment lengths can reveal lots of info, i.e. with `form-data`, how many fields are sent and the approximate length of every individual field and its headers - reduces encryption overhead: a quick benchmark showed a ~30% CPU time decrease for an extreme case, see #27573 (comment) Fixes: #27573 Backport-PR-URL: #28904 PR-URL: #27861 Reviewed-By: Fedor Indutny <[email protected]> Reviewed-By: Anna Henningsen <[email protected]> Reviewed-By: Ujjwal Sharma <[email protected]> Reviewed-By: Rich Trott <[email protected]>
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Backport of #27861 (and also #27891 and #28903 to fix tests).
The original code uses
AllocatedBuffer, so we would need to also backport #26207 (specifically 6c257cd). Instead I've defined it asvector<char>which has almost identical API; are these changes okay for backports?