| commit | 3c4aac89819a5fdc28d906456729d3423fd46969 | [log] [tgz] |
|---|---|---|
| author | Andy Wang <cbeuw.andy@gmail.com> | Sat Apr 18 01:52:37 2020 +0000 |
| committer | Filippo Valsorda <filippo@golang.org> | Mon Apr 20 20:11:42 2020 +0000 |
| tree | c3d9a234c841dd434fc6000aabe118cc9a159608 | |
| parent | a76a400e302568c342acfdbe6e92c6531be3eb86 [diff] |
chacha20: improve generic implementation performance Some small changes to improve computation throughput of noasm chacha20 by between 4-11%. name old time/op new time/op delta ChaCha20/64-12 142ns ± 1% 132ns ± 1% -7.09% (p=0.000 n=20+20) ChaCha20/256-12 485ns ± 1% 441ns ± 1% -9.08% (p=0.000 n=20+20) ChaCha20/10x25-12 822ns ± 1% 785ns ± 1% -4.42% (p=0.000 n=20+20) ChaCha20/4096-12 484ns ± 1% 442ns ± 1% -8.80% (p=0.000 n=20+19) ChaCha20/100x40-12 8.65µs ± 1% 8.08µs ± 1% -6.54% (p=0.000 n=19+20) ChaCha20/65536-12 118µs ± 1% 106µs ± 1% -10.04% (p=0.000 n=19+20) ChaCha20/1000x65-12 120µs ± 1% 108µs ± 0% -9.84% (p=0.000 n=19+19) name old speed new speed delta ChaCha20/64-12 450MB/s ± 1% 484MB/s ± 1% +7.61% (p=0.000 n=19+19) ChaCha20/256-12 527MB/s ± 1% 580MB/s ± 1% +10.03% (p=0.000 n=20+20) ChaCha20/10x25-12 304MB/s ± 1% 318MB/s ± 1% +4.62% (p=0.000 n=20+20) ChaCha20/4096-12 529MB/s ± 1% 580MB/s ± 1% +9.70% (p=0.000 n=19+20) ChaCha20/100x40-12 463MB/s ± 1% 495MB/s ± 1% +7.00% (p=0.000 n=19+20) ChaCha20/65536-12 556MB/s ± 1% 618MB/s ± 1% +11.16% (p=0.000 n=19+20) ChaCha20/1000x65-12 542MB/s ± 1% 602MB/s ± 0% +10.92% (p=0.000 n=19+19) Redundant bound checks on loading key and nonce as uint32s in newUnauthenticatedCipher are eliminated. In the main block loop, two changes were made: 1. Specialise the xor function to addXor, so the final block state variables don't need to be separately incremented by the initial block state before XORing with the input block. 2. Change the loop condition to be bound by len(src) >=64 and len(dst) >= 64. This eliminates all bound checks later in the load-xor-store stage. As a result, src and dst are resliced in-place after each block. Change-Id: Ic3165a556bf7cb2d71349d534cdd21d06d9a7a2c GitHub-Last-Rev: b3b1a185004c551919a8984547a5bac0283919a1 GitHub-Pull-Request: golang/crypto#131 Reviewed-on: https://go-review.googlesource.com/c/crypto/+/228618 Run-TryBot: Filippo Valsorda <filippo@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Filippo Valsorda <filippo@golang.org>
This repository holds supplementary Go cryptography libraries.
The easiest way to install is to run go get -u golang.org/x/crypto/.... You can also manually git clone the repository to $GOPATH/src/golang.org/x/crypto.
This repository uses Gerrit for code changes. To learn how to submit changes to this repository, see https://golang.org/doc/contribute.html.
The main issue tracker for the crypto repository is located at https://github.com/golang/go/issues. Prefix your issue with “x/crypto:” in the subject line, so it is easy to find.
Note that contributions to the cryptography package receive additional scrutiny due to their sensitive nature. Patches may take longer than normal to receive feedback.