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| author | Martin Leitner-Ankerl <martin.ankerl@gmail.com> | 2022-03-23 07:08:32 +0100 |
|---|---|---|
| committer | Martin Leitner-Ankerl <martin.ankerl@gmail.com> | 2022-04-17 14:29:52 +0200 |
| commit | 5e61532e72c1021fda9c7b213bd9cf397cb3a802 (patch) | |
| tree | 2457af2105ec1c74211160f07e6b057352392182 /src/Makefile.am | |
| parent | 4e2b99f72a90b956f3050095abed4949aff9b516 (diff) | |
| download | bitcoin-5e61532e72c1021fda9c7b213bd9cf397cb3a802.tar.xz | |
util: optimizes HexStr
In my benchmark, this rewrite improves runtime 27% (g++) to 46% (clang++) for the benchmark `HexStrBench`:
g++ 11.2.0
| ns/byte | byte/s | err% | ins/byte | cyc/byte | IPC | bra/byte | miss% | total | benchmark
|--------------------:|--------------------:|--------:|----------------:|----------------:|-------:|---------------:|--------:|----------:|:----------
| 0.94 | 1,061,381,310.36 | 0.7% | 12.00 | 3.01 | 3.990 | 1.00 | 0.0% | 0.01 | `HexStrBench` master
| 0.68 | 1,465,366,544.25 | 1.7% | 6.00 | 2.16 | 2.778 | 1.00 | 0.0% | 0.01 | `HexStrBench` branch
clang++ 13.0.1
| ns/byte | byte/s | err% | ins/byte | cyc/byte | IPC | bra/byte | miss% | total | benchmark
|--------------------:|--------------------:|--------:|----------------:|----------------:|-------:|---------------:|--------:|----------:|:----------
| 0.80 | 1,244,713,415.92 | 0.9% | 10.00 | 2.56 | 3.913 | 0.50 | 0.0% | 0.01 | `HexStrBench` master
| 0.43 | 2,324,188,940.72 | 0.2% | 4.00 | 1.37 | 2.914 | 0.25 | 0.0% | 0.01 | `HexStrBench` branch
Note that the idea for this change comes from denis2342 in PR 23364. This is a rewrite so no unaligned accesses occur.
Also, the lookup table is now calculated at compile time, which hopefully makes the code a bit easier to review.
Diffstat (limited to 'src/Makefile.am')
0 files changed, 0 insertions, 0 deletions