54 lines
1.1 KiB
Markdown
54 lines
1.1 KiB
Markdown
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# Go Fast Replace
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An implementation in Go.
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## To build
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````bash
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make build
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````
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## To run
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````bash
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make run
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````
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## To test
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````bash
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make test
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````
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## Conclusions
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### Replace
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Current implementations:
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- `bm` uses `strings.NewReplacer` which uses the [Boyer–Moore](https://go.dev/src/strings/search.go) algorithm.
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- `cw` uses [Commentz–Walter](https://en.wikipedia.org/wiki/Commentz-Walter_algorithm) algorithm.
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#### Results
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- `bm` varies a lot, but is never over _460µs_.
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- `cw` is a lot slower, at around _3.5ms_, but it can search for multiple patterns at once.
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````shell
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$ make run
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./bin/corpus
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Creating corpus...
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./bin/pairs
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Creating pairs...
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./bin/replace
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bm: 273.621µs
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cw: 2.939254ms
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````
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#### Todo:
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- Implement parallelism on the Commentz–Walter implementation.
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- [Boyer–Moore variants](https://en.wikipedia.org/wiki/Boyer%E2%80%93Moore_string-search_algorithm#Variants)
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- [Rabin–Karp](https://en.wikipedia.org/wiki/Rabin%E2%80%93Karp_algorithm) algorithm.
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- [Aho–Corasick](https://en.wikipedia.org/wiki/Aho%E2%80%93Corasick_algorithm) algorithm.
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