commit 492fbed2a50406b49d38a1712e961ffc2c4bdc37 parent 16636e6005799350ec8ddca9d565167e489702a6 Author: Jared Tobin <jared@jtobin.io> Date: Sun, 23 Feb 2025 10:18:46 +0400 meta: perf notes Diffstat:
| M | README.md | | | 46 | ++++++++++++++++++++++++++++++++++++++++++++++ |
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diff --git a/README.md b/README.md @@ -42,6 +42,52 @@ A sample GHCi session: Haddocks (API documentation, etc.) are hosted at [docs.ppad.tech/bip32](https://docs.ppad.tech/bip32). +## Performance + +The aim is best-in-class performance for pure, highly-auditable Haskell +code. Most time is spent on elliptic curve multiplication or hashing; +strict BIP32 functionality is only a small layer on top of that. + +Current benchmark figures on my mid-2020 MacBook Air look like (use +`cabal bench` to run the benchmark suite): + +``` + benchmarking ppad-bip32/derive_child_pub + time 7.766 ms (7.404 ms .. 8.215 ms) + 0.985 R² (0.975 R² .. 0.995 R²) + mean 7.717 ms (7.565 ms .. 7.890 ms) + std dev 463.5 μs (362.7 μs .. 653.5 μs) + variance introduced by outliers: 31% (moderately inflated) + + benchmarking ppad-bip32/derive_child_priv + time 5.080 ms (4.884 ms .. 5.277 ms) + 0.991 R² (0.985 R² .. 0.997 R²) + mean 5.045 ms (4.974 ms .. 5.140 ms) + std dev 252.6 μs (201.1 μs .. 310.9 μs) + variance introduced by outliers: 28% (moderately inflated) + + benchmarking ppad-bip32/xpub + time 2.654 ms (2.571 ms .. 2.771 ms) + 0.984 R² (0.976 R² .. 0.992 R²) + mean 2.613 ms (2.538 ms .. 2.684 ms) + std dev 242.8 μs (204.0 μs .. 284.3 μs) + variance introduced by outliers: 64% (severely inflated) + + benchmarking ppad-bip32/xprv + time 28.10 μs (25.95 μs .. 30.39 μs) + 0.949 R² (0.910 R² .. 0.987 R²) + mean 27.39 μs (25.84 μs .. 30.17 μs) + std dev 6.442 μs (3.813 μs .. 10.21 μs) + variance introduced by outliers: 97% (severely inflated) + + benchmarking ppad-bip32/parse + time 33.20 μs (31.98 μs .. 34.31 μs) + 0.993 R² (0.989 R² .. 0.997 R²) + mean 32.89 μs (32.08 μs .. 33.81 μs) + std dev 2.958 μs (2.300 μs .. 3.970 μs) + variance introduced by outliers: 81% (severely inflated) +``` + ## Security This library aims at the maximum security achievable in a