Performance Relational Components Performance

Relational Component Performance Benchmarks

Relational component attributes ([SiblingComponent], [ParentComponent], [ChildComponent]) remove repetitive GetComponent* code. These benchmarks quantify the runtime cost of calling Assign*Components for common field shapes (single component, array, List<T>, and HashSet<T>) against hand-written lookups.

Numbers below are grouped by operating system. A section reading pending means nobody has run this suite on that platform, not that the attributes are slow there.

Windows (Editor/Player)

Last updated 2026-05-08 04:09 UTC on Windows 11 (10.0.26200) 64bit.

Numbers capture repeated Assign*Components calls for one second per scenario. Higher operations per second are better.

Operations per second (higher is better)

Scenario	Relational Ops/s	Manual Ops/s	Rel/Manual	Iterations
Parent - Single	727,869	5,749,952	0.13x	730,000
Parent - Array	445,375	3,343,147	0.13x	450,000
Parent - List	491,299	4,194,708	0.12x	500,000
Parent - HashSet	479,674	2,949,101	0.16x	480,000
Child - Single	496,367	3,564,321	0.14x	500,000
Child - Array	187,832	2,392,107	0.08x	190,000
Child - List	193,706	2,594,739	0.07x	200,000
Child - HashSet	194,977	1,728,196	0.11x	200,000
Sibling - Single	3,797,711	14,448,211	0.26x	3,800,000
Sibling - Array	687,153	2,578,904	0.27x	690,000
Sibling - List	838,603	3,380,690	0.25x	840,000
Sibling - HashSet	826,435	1,872,130	0.44x	830,000

macOS

Pending — run the relational component benchmark suite on macOS to capture results.

Linux

Pending — run the relational component benchmark suite on Linux to capture results.

Other Platforms

Pending — run the relational component benchmark suite on the target platform to capture results.

Refreshing these numbers

Run RelationalComponentBenchmarkTests.Benchmark from Unity's Test Runner. It rewrites the section matching the operating system it ran on and leaves the others alone.