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diff --git a/vendor/github.com/dolthub/swiss/README.md b/vendor/github.com/dolthub/swiss/README.md new file mode 100644 index 000000000..71c6f7dd0 --- /dev/null +++ b/vendor/github.com/dolthub/swiss/README.md @@ -0,0 +1,54 @@ +# SwissMap + +SwissMap is a hash table adapated from the "SwissTable" family of hash tables from [Abseil](https://abseil.io/blog/20180927-swisstables). It uses [AES](https://github.com/dolthub/maphash) instructions for fast-hashing and performs key lookups in parallel using [SSE](https://en.wikipedia.org/wiki/Streaming_SIMD_Extensions) instructions. Because of these optimizations, SwissMap is faster and more memory efficient than Golang's built-in `map`. If you'd like to learn more about its design and implementation, check out this [blog post](https://www.dolthub.com/blog/2023-03-28-swiss-map/) announcing its release. + + +## Example + +SwissMap exposes the same interface as the built-in `map`. Give it a try using this [Go playground](https://go.dev/play/p/JPDC5WhYN7g). + +```go +package main + +import "github.com/dolthub/swiss" + +func main() { + m := swiss.NewMap[string, int](42) + + m.Put("foo", 1) + m.Put("bar", 2) + + m.Iter(func(k string, v int) (stop bool) { + println("iter", k, v) + return false // continue + }) + + if x, ok := m.Get("foo"); ok { + println(x) + } + if m.Has("bar") { + x, _ := m.Get("bar") + println(x) + } + + m.Put("foo", -1) + m.Delete("bar") + + if x, ok := m.Get("foo"); ok { + println(x) + } + if m.Has("bar") { + x, _ := m.Get("bar") + println(x) + } + + m.Clear() + + // Output: + // iter foo 1 + // iter bar 2 + // 1 + // 2 + // -1 +} +``` |