Optimize profiler hot paths, eliminate per-frame GC allocations, fix null-pointer crash, and add runtime tests by keveleigh · Pull Request #1149 · MixedRealityToolkit/MixedRealityToolkit-Unity

keveleigh · 2026-10-15T21:08:21Z

	Execution Time	Memory Allocations	Speedup vs. Baseline	Time Reduction
Baseline (Before) Per-frame string interpolations ($"{limitBytes} ({limitMegabytes:0.00})") & ToString("0.00") across all 5 metrics	1.707 µs	5 string allocations/frame (~250–300 strings/sec)	1.0x (baseline)	0% (baseline)
Optimized on Value Change (After) Zero-GC FormatRamString with reusable buffer + TMP_Text.SetText	0.236 µs	0 B (Zero GC)	7.2x faster	86.2% reduction
Optimized Steady-State (After) Delta-caching hot path when metrics are unchanged	0.011 µs	0 B (Zero GC)	155.2x faster	99.4% reduction

…null-pointer crash, and add runtime tests

keveleigh self-assigned this Oct 15, 2026

keveleigh requested a review from a team as a code owner October 15, 2026 21:08

keveleigh added the Package: Diagnostics The Project diagnostics package is impacted by this issue. label Oct 15, 2026

github-actions Bot added the Branch: main label Oct 15, 2026

keveleigh enabled auto-merge (squash) October 15, 2026 21:08

keveleigh force-pushed the diagnostics-perf branch from 2e84dcd to 10bb213 Compare October 15, 2026 21:13

keveleigh marked this pull request as draft October 15, 2026 21:52

auto-merge was automatically disabled October 15, 2026 21:52
Pull request was converted to draft

keveleigh force-pushed the diagnostics-perf branch 2 times, most recently from ce1787c to c912fcf Compare October 16, 2026 19:39

Optimize profiler hot paths, eliminate per-frame GC allocations, fix …

733e46e

…null-pointer crash, and add runtime tests

keveleigh force-pushed the diagnostics-perf branch from c912fcf to 733e46e Compare October 16, 2026 22:52

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