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2019-03-27 23:25:59 -04:00
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[![Build Status](https://travis-ci.org/greg7mdp/parallel_hashmap.svg?branch=master)](https://travis-ci.org/greg7mdp/parallel-hashmap) [![Build Status](https://ci.appveyor.com/api/projects/status/github/greg7mdp/parallel_hashmap)](https://ci.appveyor.com/project/greg7mdp/parallel-hashmap)
[![Build Status](https://travis-ci.org/greg7mdp/parallel_hashmap.svg?branch=master)](https://travis-ci.org/greg7mdp/parallel-hashmap) [![Build Status](https://ci.appveyor.com/api/projects/status/86kc657lp4cja8ju?svg=true)](https://ci.appveyor.com/project/greg7mdp/parallel-hashmap)
# The Parallel Hashmap: very fast, very memory friendly
Click here [For a full writeup explaining the design and benefits of the Parallel Hashmap](https://greg7mdp.github.io/parallel-hashmap/).
> **IMPORTANT:** This repository borrowed a lot of code from the [abseil-cpp](https://github.com/abseil/abseil-cpp) repository, notably for the implementations of `phmap::flat_hash_map`, `phmap::flat_hash_set`, `phmap::node_hash_map` and `phmap::node_hash_set`. Please be aware that the code from [abseil-cpp](https://github.com/abseil/abseil-cpp) has been modified, and may behave differently than the original.
This repository should be construed as an independent work, with no guarantees of any kind implied or provided by the authors. Please go to [abseil-cpp](https://github.com/abseil/abseil-cpp) for the official Abseil libraries.
> **IMPORTANT:** This repository borrows code from the [abseil-cpp](https://github.com/abseil/abseil-cpp) repository, with modifications, and may behave differently from the original. This repository is an independent work, with no guarantees implied or provided by the authors. Please go to [abseil-cpp](https://github.com/abseil/abseil-cpp) for the official Abseil libraries.
# Work in progress - please do not use yet - should be ready before the end of March 2019
This repository aims to provide an set of excellent hash map implementations, with the following characteristics:
- **header only**: nothing to build, just copy the `parallel_hashmap` directory to your project and you are good to go.
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- **Memory friendly**: low memory usage, although a little higher than [sparsepp](https://github.com/greg7mdp/sparsepp)
- support heterogeneous lookup
- support **heterogeneous lookup**
- **Tested** on Windows (vs2015 & vs2017), linux (g++ 5, 6, 7, 8, clang++ 3.9, 4.0, 5.0) and MacOS (g++ and clang++) - click on travis-ci and appveyor-ci icons above for detailed test status.
- **Tested** ~~on Windows (vs2015 & vs2017), linux (g++ 5, 6, 7, 8, clang++ 3.9, 4.0, 5.0) and MacOS (g++ and clang++)~~ (click on travis-ci and appveyor-ci icons above).
## Installation
Copy the parallel_hashmap directory to your project. That's all.
Copy the parallel_hashmap directory to your project. Update your include path. That's all.
> cmake configuration files (CMakeLists.txt) are provided for building the tests and examples.
> cmake configuration files (CMakeLists.txt) are provided for building the tests and examples. Command for building and running the tests is: `mkdir build && cd build && cmake -DPHMAP_BUILD_TESTS=ON .. && cmake --build . && make test`
## Example