src: avoid redundant KEM encapsulation copies#64553
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KEM encapsulation produces separate ciphertext and shared-secret allocations. The existing DeriveBitsJob path packs both values into an intermediate buffer, then copies them again into separate buffers. Instead, this uses a dedicated KEMEncapsulateJob to retain both outputs across the worker boundary and convert each directly through ByteSource. This removes the intermediate allocation and at least one complete round of copies. Signed-off-by: Filip Skokan <panva.ip@gmail.com>
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Codecov Report❌ Patch coverage is
Additional details and impacted files@@ Coverage Diff @@
## main #64553 +/- ##
==========================================
- Coverage 90.24% 90.23% -0.02%
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Files 739 739
Lines 241698 241709 +11
Branches 45556 45551 -5
==========================================
- Hits 218129 218113 -16
- Misses 15103 15119 +16
- Partials 8466 8477 +11
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KEM encapsulation produces separate ciphertext and shared-secret allocations. The existing
DeriveBitsJobpath packs both values into an intermediate buffer, then copies them again into separate buffers.Instead, this uses a dedicated KEMEncapsulateJob to retain both outputs across the worker boundary and convert each directly through ByteSource. This removes the intermediate allocation and at least one complete round of copies.