+++ /dev/null
-# regex-cache [](https://www.npmjs.com/package/regex-cache) [](https://npmjs.org/package/regex-cache) [](https://npmjs.org/package/regex-cache) [](https://travis-ci.org/jonschlinkert/regex-cache) [](https://ci.appveyor.com/project/jonschlinkert/regex-cache)
-
-> Memoize the results of a call to the RegExp constructor, avoiding repetitious runtime compilation of the same string and options, resulting in surprising performance improvements.
-
-## Install
-
-Install with [npm](https://www.npmjs.com/):
-
-```sh
-$ npm install --save regex-cache
-```
-
-* Read [what this does](#what-this-does).
-* See [the benchmarks](#benchmarks)
-
-## Usage
-
-Wrap a function like this:
-
-```js
-var cache = require('regex-cache');
-var someRegex = cache(require('some-regex-lib'));
-```
-
-**Caching a regex**
-
-If you want to cache a regex after calling `new RegExp()`, or you're requiring a module that returns a regex, wrap it with a function first:
-
-```js
-var cache = require('regex-cache');
-
-function yourRegex(str, opts) {
- // do stuff to str and opts
- return new RegExp(str, opts.flags);
-}
-
-var regex = cache(yourRegex);
-```
-
-## Recommendations
-
-### Use this when...
-
-* **No options are passed** to the function that creates the regex. Regardless of how big or small the regex is, when zero options are passed, caching will be faster than not.
-* **A few options are passed**, and the values are primitives. The limited benchmarks I did show that caching is beneficial when up to 8 or 9 options are passed.
-
-### Do not use this when...
-
-* **The values of options are not primitives**. When non-primitives must be compared for equality, the time to compare the options is most likely as long or longer than the time to just create a new regex.
-
-### Example benchmarks
-
-Performance results, with and without regex-cache:
-
-```bash
-# no args passed (defaults)
- with-cache x 8,699,231 ops/sec ±0.86% (93 runs sampled)
- without-cache x 2,777,551 ops/sec ±0.63% (95 runs sampled)
-
-# string and six options passed
- with-cache x 1,885,934 ops/sec ±0.80% (93 runs sampled)
- without-cache x 1,256,893 ops/sec ±0.65% (97 runs sampled)
-
-# string only
- with-cache x 7,723,256 ops/sec ±0.87% (92 runs sampled)
- without-cache x 2,303,060 ops/sec ±0.47% (99 runs sampled)
-
-# one option passed
- with-cache x 4,179,877 ops/sec ±0.53% (100 runs sampled)
- without-cache x 2,198,422 ops/sec ±0.47% (95 runs sampled)
-
-# two options passed
- with-cache x 3,256,222 ops/sec ±0.51% (99 runs sampled)
- without-cache x 2,121,401 ops/sec ±0.79% (97 runs sampled)
-
-# six options passed
- with-cache x 1,816,018 ops/sec ±1.08% (96 runs sampled)
- without-cache x 1,157,176 ops/sec ±0.53% (100 runs sampled)
-
-#
-# diminishing returns happen about here
-#
-
-# ten options passed
- with-cache x 1,210,598 ops/sec ±0.56% (92 runs sampled)
- without-cache x 1,665,588 ops/sec ±1.07% (100 runs sampled)
-
-# twelve options passed
- with-cache x 1,042,096 ops/sec ±0.68% (92 runs sampled)
- without-cache x 1,389,414 ops/sec ±0.68% (97 runs sampled)
-
-# twenty options passed
- with-cache x 661,125 ops/sec ±0.80% (93 runs sampled)
- without-cache x 1,208,757 ops/sec ±0.65% (97 runs sampled)
-
-#
-# when non-primitive values are compared
-#
-
-# single value on the options is an object
- with-cache x 1,398,313 ops/sec ±1.05% (95 runs sampled)
- without-cache x 2,228,281 ops/sec ±0.56% (99 runs sampled)
-```
-
-## Run benchmarks
-
-Install dev dependencies:
-
-```bash
-npm i -d && npm run benchmarks
-```
-
-## What this does
-
-If you're using `new RegExp('foo')` instead of a regex literal, it's probably because you need to dyamically generate a regex based on user options or some other potentially changing factors.
-
-When your function creates a string based on user inputs and passes it to the `RegExp` constructor, regex-cache caches the results. The next time the function is called if the key of a cached regex matches the user input (or no input was given), the cached regex is returned, avoiding unnecessary runtime compilation.
-
-Using the RegExp constructor offers a lot of flexibility, but the runtime compilation comes at a price - it's slow. Not specifically because of the call to the RegExp constructor, but **because you have to build up the string before `new RegExp()` is even called**.
-
-## About
-
-### Contributing
-
-Pull requests and stars are always welcome. For bugs and feature requests, [please create an issue](../../issues/new).
-
-### Contributors
-
-| **Commits** | **Contributor** |
-| --- | --- |
-| 31 | [jonschlinkert](https://github.com/jonschlinkert) |
-| 1 | [MartinKolarik](https://github.com/MartinKolarik) |
-
-### Building docs
-
-_(This project's readme.md is generated by [verb](https://github.com/verbose/verb-generate-readme), please don't edit the readme directly. Any changes to the readme must be made in the [.verb.md](.verb.md) readme template.)_
-
-To generate the readme, run the following command:
-
-```sh
-$ npm install -g verbose/verb#dev verb-generate-readme && verb
-```
-
-### Running tests
-
-Running and reviewing unit tests is a great way to get familiarized with a library and its API. You can install dependencies and run tests with the following command:
-
-```sh
-$ npm install && npm test
-```
-
-### Author
-
-**Jon Schlinkert**
-
-* [github/jonschlinkert](https://github.com/jonschlinkert)
-* [twitter/jonschlinkert](https://twitter.com/jonschlinkert)
-
-### License
-
-Copyright © 2017, [Jon Schlinkert](https://github.com/jonschlinkert).
-Released under the [MIT License](LICENSE).
-
-***
-
-_This file was generated by [verb-generate-readme](https://github.com/verbose/verb-generate-readme), v0.6.0, on September 01, 2017._
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