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# entities
A C++ simple entity component system
## the library
The file that actually contains the library is entities.hpp.
## compared to EntityX
entities:
```
entities create destroy entity with components 5000000 279 ns/op
[25] entities 25 entities component systems update 1000000 1610 ns/op
[50] entities 50 entities component systems update 500000 3098 ns/op
[100] entities 100 entities component systems update 200000 6247 ns/op
[200] entities 200 entities component systems update 100000 12274 ns/op
[400] entities 400 entities component systems update 50000 25029 ns/op
[800] entities 800 entities component systems update 20000 55717 ns/op
[1600] entities 1600 entities component systems update 10000 116305 ns/op
[3200] entities 3200 entities component systems update 5000 244461 ns/op
[5000] entities 5000 entities component systems update 5000 463835 ns/op
[10000] entities 10000 entities component systems update 1000 1647042 ns/op
[30000] entities 30000 entities component systems update 200 5784773 ns/op
[100000] entities 100000 entities component systems update 50 20711117 ns/op
[500000] entities 500000 entities component systems update 20 103582654 ns/op
[1000000] entities 1000000 entities component systems update 10 208073004 ns/op
[2000000] entities 2000000 entities component systems update 5 341977621 ns/op
./entitiesTests 45.328s
```
EntityX:
```
entityx create destroy entity with components 5000000 212 ns/op
[25] entityx 25 entities component systems update 500000 3025 ns/op
[50] entityx 50 entities component systems update 200000 6274 ns/op
[100] entityx 100 entities component systems update 100000 12101 ns/op
[200] entityx 200 entities component systems update 50000 24227 ns/op
[400] entityx 400 entities component systems update 50000 48100 ns/op
[800] entityx 800 entities component systems update 20000 95872 ns/op
[1600] entityx 1600 entities component systems update 10000 196251 ns/op
[3200] entityx 3200 entities component systems update 5000 397806 ns/op
[5000] entityx 5000 entities component systems update 2000 623035 ns/op
[10000] entityx 10000 entities component systems update 1000 1279807 ns/op
[30000] entityx 30000 entities component systems update 500 3791401 ns/op
[100000] entityx 100000 entities component systems update 100 13074271 ns/op
[500000] entityx 500000 entities component systems update 20 65787539 ns/op
[1000000] entityx 1000000 entities component systems update 10 137753731 ns/op
[2000000] entityx 2000000 entities component systems update 5 290476228 ns/op
./entityXTests 45.232s
```
You can find EntityX [here](https://github.com/alecthomas/entityx).
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