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smallzstd: new package that constructs zstd small encoders/decoders. It's just a config wrapper that passes "use less memory at the expense of compression" parameters by default, so that we don't accidentally construct resource-hungry (de)compressors. Also includes a benchmark that measures the memory cost of the small variants vs. the stock variants. The savings are significant on both compressors (~8x less memory) and decompressors (~1.4x less, not including the savings from the significantly smaller window on the compression side - with those savings included it's more like ~140x smaller). BenchmarkSmallEncoder-8 56174 19354 ns/op 31 B/op 0 allocs/op BenchmarkSmallEncoderWithBuild-8 2900 382940 ns/op 1746547 B/op 36 allocs/op BenchmarkStockEncoder-8 48921 25761 ns/op 286 B/op 0 allocs/op BenchmarkStockEncoderWithBuild-8 426 2630241 ns/op 13843842 B/op 124 allocs/op BenchmarkSmallDecoder-8 123814 9344 ns/op 0 B/op 0 allocs/op BenchmarkSmallDecoderWithBuild-8 41547 27455 ns/op 27694 B/op 31 allocs/op BenchmarkStockDecoder-8 129832 9417 ns/op 1 B/op 0 allocs/op BenchmarkStockDecoderWithBuild-8 25561 51751 ns/op 39607 B/op 92 allocs/op Signed-off-by: David Anderson <danderson@tailscale.com>
2020-07-02 19:26:33 +01:00
{"logtail":{"client_time":"2020-07-01T14:49:40.196597018-07:00","server_time":"2020-07-01T21:49:40.198371511Z"},"text":"9.8M/25.6M magicsock: starting endpoint update (periodic)\n"}
{"logtail":{"client_time":"2020-07-01T14:49:40.345925455-07:00","server_time":"2020-07-01T21:49:40.347904717Z"},"text":"9.9M/25.6M netcheck: udp=true v6=false mapvarydest=false hair=false v4a=202.188.7.1:41641 derp=2 derpdist=1v4:7ms,2v4:3ms,4v4:18ms\n"}
{"logtail":{"client_time":"2020-07-01T14:49:43.347155742-07:00","server_time":"2020-07-01T21:49:43.34828658Z"},"text":"9.9M/25.6M control: map response long-poll timed out!\n"}
{"logtail":{"client_time":"2020-07-01T14:49:43.347539333-07:00","server_time":"2020-07-01T21:49:43.358809354Z"},"text":"9.9M/25.6M control: PollNetMap: context canceled\n"}
{"logtail":{"client_time":"2020-07-01T14:49:43.347767812-07:00","server_time":"2020-07-01T21:49:43.358809354Z"},"text":"10.0M/25.6M control: sendStatus: mapRoutine1: state:authenticated\n"}
{"logtail":{"client_time":"2020-07-01T14:49:43.347817165-07:00","server_time":"2020-07-01T21:49:43.358809354Z"},"text":"10.0M/25.6M blockEngineUpdates(false)\n"}
{"logtail":{"client_time":"2020-07-01T14:49:43.347989028-07:00","server_time":"2020-07-01T21:49:43.358809354Z"},"text":"10.0M/25.6M wgcfg: [SViTM] skipping subnet route\n"}
{"logtail":{"client_time":"2020-07-01T14:49:43.349997554-07:00","server_time":"2020-07-01T21:49:43.358809354Z"},"text":"9.3M/25.6M Received error: PollNetMap: context canceled\n"}
{"logtail":{"client_time":"2020-07-01T14:49:43.350072606-07:00","server_time":"2020-07-01T21:49:43.358809354Z"},"text":"9.3M/25.6M control: mapRoutine: backoff: 30136 msec\n"}
{"logtail":{"client_time":"2020-07-01T14:49:47.998364646-07:00","server_time":"2020-07-01T21:49:47.999333754Z"},"text":"9.5M/25.6M [W1NbE] - [UcppE] Send handshake init [127.3.3.40:1, 6.1.1.6:37388*, 10.3.2.6:41641]\n"}
{"logtail":{"client_time":"2020-07-01T14:49:47.99881914-07:00","server_time":"2020-07-01T21:49:48.009859543Z"},"text":"9.6M/25.6M magicsock: adding connection to derp-1 for [W1NbE]\n"}
{"logtail":{"client_time":"2020-07-01T14:49:47.998904932-07:00","server_time":"2020-07-01T21:49:48.009859543Z"},"text":"9.6M/25.6M magicsock: 2 active derp conns: derp-1=cr0s,wr0s derp-2=cr16h0m0s,wr14h38m0s\n"}
{"logtail":{"client_time":"2020-07-01T14:49:47.999045606-07:00","server_time":"2020-07-01T21:49:48.009859543Z"},"text":"9.6M/25.6M derphttp.Client.Recv: connecting to derp-1 (nyc)\n"}
{"logtail":{"client_time":"2020-07-01T14:49:48.091104119-07:00","server_time":"2020-07-01T21:49:48.09280535Z"},"text":"9.6M/25.6M magicsock: rx [W1NbE] from 6.1.1.6:37388 (1/3), set as new priority\n"}