New 308-line test file included in main test/runtests.jl:
- Tests GlobalMaterialCache with cantilever beam problem
- Verifies ZERO allocations during state access and updates
- Tests cache creation from material traits (automatic)
- Tests time-stepping workflow with zero allocations in hot loop
- Includes performance benchmarks using BenchmarkTools
- Validates material state type inference
Comprehensive performance test ensuring material cache system has zero allocations.
Jukka Aho