smallzstd: delete unused package

2025-09-29T03:38:47Z

As of the earlier 85febda86db1, our new preferred zstd API of choice is zstdframe. Updates #cleanup Updates tailscale/corp#18514 Change-Id: I5a6164d3162bf2513c3673b6d1e34cfae84cb104 Signed-off-by: Brad Fitzpatrick

smallzstd: new package that constructs zstd small encoders/decoders.

2020-07-02T23:13:06Z

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

tailscale/smallzstd/testdata, branch debug-testwrapper

smallzstd: delete unused package

smallzstd: new package that constructs zstd small encoders/decoders.