ecs_benchmark

ECS benchmark comparison

• Creating entities
• Adding & removing components
• Iterating over entities with systems
• Ten randomized components

Frameworks

• EnTT
• reflecs

Testing hardware

The measurements were obtained on a Macbook Pro 2018 model with a 2.6Ghz Intel i7, and 16GB of memory.

Testing method

Each benchmark is isolated in its own function. Any datastructures required for the test are created during test setup, and teared down after the test has finished. Each benchmark is executed multiple times, and only the lowest measurement is reported. This is done to minimize the impact of scheduling, and to make sure measurements are taken when the data is hot (in the CPU cache).

Benchmarks

Creating entities

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Entity creation, empty (n = 1000000):

Framework	Measurement
EnTT	0.001718
Reflecs	0.001868
EnTT	0.001923 (batching)
Reflecs	0.000004 (batching)

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Entity creation, 1 component (n = 1000000):

Framework	Measurement
EnTT	0.036297
Reflecs	0.024373 (batching)

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Entity creation, 2 component (n = 1000000):

Framework	Measurement
EnTT	0.068278
Reflecs	0.014156 (batching, family)

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Entity creation, 3 component (n = 1000000):

Framework	Measurement
EnTT	0.095726
Reflecs	0.023933 (batching, family)

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Entity deletion, 1 component (n = 1000000):

Framework	Measurement
EnTT	0.008982
Reflecs	0.037047

Adding & removing components

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Add one component (n = 1000000):

Framework	Measurement
EnTT	0.009538
Reflecs	0.076293
Reflecs	0.070666 (new w/component)

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Add two components (n = 1000000):

Framework	Measurement
EnTT	0.040726
Reflecs	0.165913
Reflecs	0.081141 (add w/family)

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Add three components (n = 1000000):

Framework	Measurement
EnTT	0.055820
Reflecs	0.298559
Reflecs	0.082781 (add w/family)

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Add four components (n = 1000000):

Framework	Measurement
EnTT	0.070472

---

Remove one component (n = 1000000):

Framework	Measurement
EnTT	0.005622
Reflecs	0.069068

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Remove two components (n = 1000000):

Framework	Measurement
EnTT	0.012201
Reflecs	0.170163
Reflecs	0.072052 (remove w/family)

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Remove three components (n = 1000000):

Framework	Measurement
EnTT	0.023404
Reflecs	0.272413
Reflecs	0.076592 (remove w/family)

Iterating over entities with systems

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Iterate, one component (n = 1000000):

Framework	Measurement
EnTT	0.000508 (view)
Reflecs	0.000457

---

Iterate, two components (n = 1000000):

Framework	Measurement
EnTT	0.001581 (view)
EnTT	0.000633 (group, owning)
Reflecs	0.000685

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Iterate, two components, eight types (n = 1000000):

Framework	Measurement
EnTT	0.001585 (view)
EnTT	0.000631 (group, owning)
Reflecs	0.000627

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Iterate, two components, eight types, four matching (n = 1000000):

Framework	Measurement
EnTT	0.002954 (view)
EnTT	0.000663 (group, owning)
Reflecs	0.000616

---

Iterate, three components (n = 1000000):

Framework	Measurement
EnTT	0.002287 (view)
EnTT	0.000905 (group, owning)
Reflecs	0.000750

---

Iterate, three components, two types (n = 1000000):

Framework	Measurement
EnTT	0.002107 (view)
EnTT	0.000965 (group, owning)
Reflecs	0.000794

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Iterate, three components, eight types (n = 1000000):

Framework	Measurement
EnTT	0.002336 (view)
EnTT	0.000958 (group, owning)
Reflecs	0.000798

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Iterate, three components, eight types, four matching (n = 1000000):

Framework	Measurement
EnTT	0.004407 (view)
EnTT	0.000920 (group, owning)
Reflecs	0.000776

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Iterate, four components, eight types (n = 1000000):

Framework	Measurement
EnTT	0.002430 (view)
EnTT	0.001142 (group, owning)
Reflecs	0.000956

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Iterate, four components, eight types, four matching (n = 1000000):

Framework	Measurement
EnTT	0.004308 (view)
EnTT	0.001158 (group, owning)
Reflecs	0.001047

Ten randomized components

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Pathological, one component, 1024 types (n = 1000000):

Framework	Measurement
EnTT	0.000409 (view)
Reflecs	0.000530

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Pathological, two components, 1024 types (n = 1000000):

Framework	Measurement
EnTT	0.001597 (view)
EnTT	0.000675 (group, owning)
Reflecs	0.000838

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Pathological, three components, 1024 types (n = 1000000):

Framework	Measurement
EnTT	0.002340 (view)
EnTT	0.000903 (group, owning)
Reflecs	0.001109

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Pathological, four components, 1024 types (n = 1000000):

Framework	Measurement
EnTT	0.003563 (view)
EnTT	0.001143 (group, owning)
Reflecs	0.001388