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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:
```
entityx create destroy entity with components 5000000 254 ns/op
[25] entityx 25 entities component systems update 1000000 1572 ns/op
[50] entityx 50 entities component systems update 500000 3009 ns/op
[100] entityx 100 entities component systems update 200000 5995 ns/op
[200] entityx 200 entities component systems update 100000 11848 ns/op
[400] entityx 400 entities component systems update 50000 23631 ns/op
[800] entityx 800 entities component systems update 20000 51669 ns/op
[1600] entityx 1600 entities component systems update 10000 112446 ns/op
[3200] entityx 3200 entities component systems update 5000 225504 ns/op
[5000] entityx 5000 entities component systems update 5000 368282 ns/op
[10000] entityx 10000 entities component systems update 1000 1240502 ns/op
[30000] entityx 30000 entities component systems update 200 5196731 ns/op
[100000] entityx 100000 entities component systems update 100 18331731 ns/op
[500000] entityx 500000 entities component systems update 20 93182044 ns/op
[1000000] entityx 1000000 entities component systems update 10 191315282 ns/op
[2000000] entityx 2000000 entities component systems update 5 299790721 ns/op
./test 43.175s
```
EntityX:
```
entityx create destroy entity with components 5000000 200 ns/op
[25] entityx 25 entities component systems update 500000 2903 ns/op
[50] entityx 50 entities component systems update 200000 5721 ns/op
[100] entityx 100 entities component systems update 100000 11338 ns/op
[200] entityx 200 entities component systems update 50000 22622 ns/op
[400] entityx 400 entities component systems update 50000 45560 ns/op
[800] entityx 800 entities component systems update 20000 92718 ns/op
[1600] entityx 1600 entities component systems update 10000 180159 ns/op
[3200] entityx 3200 entities component systems update 5000 360127 ns/op
[5000] entityx 5000 entities component systems update 2000 563316 ns/op
[10000] entityx 10000 entities component systems update 1000 1130659 ns/op
[30000] entityx 30000 entities component systems update 500 3431964 ns/op
[100000] entityx 100000 entities component systems update 100 11680312 ns/op
[500000] entityx 500000 entities component systems update 20 59996331 ns/op
[1000000] entityx 1000000 entities component systems update 10 128663563 ns/op
[2000000] entityx 2000000 entities component systems update 5 271582063 ns/op
./xtest 41.912s
```
You can find EntityX [here](https://github.com/alecthomas/entityx).
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