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44 lines
1.5 KiB
Markdown
44 lines
1.5 KiB
Markdown
# wallet_crypto_bench
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Wallet-side cryptographic primitives. Measures the per-call cost of key derivation, sender-side DH for note encryption, and Account note symmetric encrypt/decrypt. Standalone host binary, no live stack required.
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## Machine
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| Field | Value |
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|---|---|
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| Chip | Apple M2 Pro (8P+4E) |
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| RAM | 16 GB |
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| OS | macOS 15.5 |
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| Rust | 1.94.0 |
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| Profile | release |
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## Results
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100 timed iterations per operation, 2 warmup discarded.
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| Operation | best (µs) | mean (µs) | stdev (µs) |
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|---|---:|---:|---:|
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| KeyChain::new_os_random | 2,979.62 (2.98 ms) | 3,138.18 (3.14 ms) | 258.59 (0.26 ms) |
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| KeyChain::new_mnemonic | 2,979.12 (2.98 ms) | 3,012.76 (3.01 ms) | 46.09 (0.05 ms) |
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| SharedSecretKey::new (sender DH) | 74.17 (0.07 ms) | 74.48 (0.07 ms) | 0.22 (<0.01 ms) |
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| EncryptionScheme::encrypt | 0.88 (<0.01 ms) | 0.92 (<0.01 ms) | 0.03 (<0.01 ms) |
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| EncryptionScheme::decrypt | 0.75 (<0.01 ms) | 0.78 (<0.01 ms) | 0.04 (<0.01 ms) |
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## Findings
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- Keychain creation is dominated by the 2048-round HMAC-SHA512 PBKDF in the mnemonic-to-SSK path. ≈ 3 ms.
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- Per-recipient DH (secp256k1) is ≈ 80 µs. Outbound shielded transfers to N recipients cost ≈ 80·N µs of crypto on top of proving.
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- Symmetric encrypt/decrypt over a 49-byte Account note is sub-µs. Bulk encryption is not the bottleneck.
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## Reproduce
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```sh
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cargo run --release -p wallet_crypto_bench
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```
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JSON output: `target/wallet_crypto_bench.json`.
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## Caveats
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- Single-thread, no SIMD acceleration. Bench dev box uses the pure-Rust secp256k1 backend.
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