Commit Graph

18 Commits

Author SHA1 Message Date
greatroar
dc145bfad7
lib/protocol: Use sha256.Sum256 in NewDeviceID (#6775)
This is shorter, skips two allocations, makes the function inlineable
and is safer, since the compiler now check whether
DeviceIDLength == sha256.Size.
2020-06-21 20:38:06 +02:00
André Colomb
46536509d7
lib/protocol: Avoid panic in DeviceIDFromBytes (#6714) 2020-06-07 10:31:12 +02:00
greatroar
1e2379df1b
lib/protocol: faster Luhn algorithm and better testing (#6475)
The previous implementation was very generic; its tests didn't cover the
actual alphabet for device IDs.

Benchmark results on amd64:

name         old time/op    new time/op     delta
Luhnify-8      1.00µs ± 1%     0.28µs ± 4%   -72.38%  (p=0.000 n=9+10)
Unluhnify-8     992ns ± 2%      274ns ± 1%   -72.39%  (p=0.000 n=10+9)
2020-03-29 22:28:04 +02:00
Jakob Borg
c2ddc83509 all: Revert the underscore sillyness 2019-02-02 12:16:27 +01:00
Jakob Borg
0b2cabbc31
all: Even more boring linter fixes (#5501) 2019-02-02 11:45:17 +01:00
Jakob Borg
f822b10550
all: Add receive only folder type (#5027)
Adds a receive only folder type that does not send changes, and where the user can optionally revert local changes. Also changes some of the icons to make the three folder types distinguishable.
2018-07-12 11:15:57 +03:00
Jakob Borg
2dd9450793 lib/protocol, vendor: Import luhn code directly
I've changed it incompatibly to fix a correctness bug. Nonetheless, we
should remain incorrect indefinitely.
2017-09-20 21:34:32 +02:00
Jakob Borg
9682bbfbda lib/protocol: Optimize luhn and chunk functions
These functions were very naive and slow. We haven't done much about
them because they pretty much don't matter at all for Syncthing
performance. They are however called very often in the discovery server
and these optimizations have a huge effect on the CPU load on the
public discovery servers.

The code isn't exactly obvious, but we have good test coverage on all
these functions.

benchmark                 old ns/op     new ns/op     delta
BenchmarkLuhnify-8        12458         1045          -91.61%
BenchmarkUnluhnify-8      12598         1074          -91.47%
BenchmarkChunkify-8       10792         104           -99.04%

benchmark                 old allocs     new allocs     delta
BenchmarkLuhnify-8        18             1              -94.44%
BenchmarkUnluhnify-8      18             1              -94.44%
BenchmarkChunkify-8       44             2              -95.45%

benchmark                 old bytes     new bytes     delta
BenchmarkLuhnify-8        1278          64            -94.99%
BenchmarkUnluhnify-8      1278          64            -94.99%
BenchmarkChunkify-8       42552         128           -99.70%

GitHub-Pull-Request: https://github.com/syncthing/syncthing/pull/4346
2017-09-03 10:26:12 +00:00
Jakob Borg
e0405de5bf lib/protocol: More descriptive errors on device ID parse failures 2017-04-27 14:45:35 +09:00
Nathan Morrison
0725e3af38 all: Add a global change list
GitHub-Pull-Request: https://github.com/syncthing/syncthing/pull/3694
2016-12-21 16:35:20 +00:00
Jakob Borg
3088dac33b lib/model: Clean up generateClusterConfig, fix spurious test failure by sorting 2016-11-17 07:45:45 +01:00
Jakob Borg
95c738ea28 lib/protocol: Serialize the all zeroes device ID to the empty string
GitHub-Pull-Request: https://github.com/syncthing/syncthing/pull/3734
2016-11-15 06:22:36 +00:00
Jakob Borg
0296c23685 lib/protocol: Use DeviceID in protocol messages, with custom marshalling
This makes the device ID a real type that can be used in the protobuf
schema. That avoids the juggling back and forth from []byte in a bunch
of places and simplifies the code.

GitHub-Pull-Request: https://github.com/syncthing/syncthing/pull/3695
2016-10-29 21:56:24 +00:00
Jakob Borg
d328e0fb75 cmd/syncthing: Add selectable sha256 package (fixes #3613, fixes #3614)
This adds autodetection of the fastest hashing library on startup, thus
handling the performance regression. It also adds an environment
variable to control the selection, STHASHING=standard (Go standard
library version, avoids SIGILL crash when the minio library has bugs on
odd CPUs), STHASHING=minio (to force using the minio version) or unset
for the default autodetection.

GitHub-Pull-Request: https://github.com/syncthing/syncthing/pull/3617
2016-09-23 19:33:54 +00:00
Jakob Borg
5e99d38412 all: Use github.com/minio/sha256-simd
GitHub-Pull-Request: https://github.com/syncthing/syncthing/pull/3581
2016-09-09 09:57:51 +00:00
Jakob Borg
f5f0e46016 lib: Use bytes.Equal instead of bytes.Compare where possible 2016-03-31 15:12:46 +00:00
Jakob Borg
11d4986517 Humanize serialization of version vectors (again) 2016-01-20 11:14:08 -08:00
Jakob Borg
4316992d95 Add 'lib/protocol/' from commit 'f91191218b192ace841c878f161832d19c09145a'
git-subtree-dir: lib/protocol
git-subtree-mainline: 5ecb8bdd8a
git-subtree-split: f91191218b
2015-09-22 19:34:29 +02:00