Optimize Entity.WriteTo when encoding/charset are unchanged#87
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@@ Coverage Diff @@
## master #87 +/- ##
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+ Coverage 79.49% 79.70% +0.20%
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Files 15 15
Lines 995 1005 +10
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+ Hits 791 801 +10
Misses 128 128
Partials 76 76
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This doesn't work if |
foxcpp
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Apr 29, 2020
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| } else if w.encoding == e.encoding && w.charset == e.charset { | ||
| _, err = io.Copy(w.rawWriter, e.originalBody) |
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Perhaps then this branch can also check whether e.Body was replaced by the user? Or, add a getter/setter pair for Body that will invalidate originalBody.
tienipia
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Jun 9, 2026
…unchanged WriteTo always decoded and re-encoded the body, which could change base64 line wrapping or QP representation and alter DKIM body hashes. When the output transfer encoding and charset match the input (case-insensitively), copy the original undecoded bytes through verbatim, extending byte-preserving round-tripping from the header to the body. - encoding/charset are compared with EqualFold (case-insensitive per RFC) - an Entity built without New (nil originalBody) falls back to the normal path to avoid a nil-reader panic - originalBody shares the underlying reader with Body, so WriteTo must be called before reading Body (documented) Originally by Simon Ser (emersion#87).
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Closes: #86