[jogibear9988]

Numeric switch cases evaluated at runtime are rejected, and constant-input folding can skip an earlier runtime-dependent case and its effects. Use ordered comparisons when a numeric case cannot use the constant table; stop folding before runtime-dependent tests.

Validation

The focused regression reproduces a failure or crash on master a0950432 and passes with this change. Release solution build passes with zero warnings/errors. Both Standard and LightExpression native suites run.

Runtime	TestX passed	Legacy passed
.NET 10	359	1,756
.NET 8	359	1,755
.NET Framework 4.7.2	340	1,639

Measurements

Compare master a0950432 with this commit c62a22c4. Windows ARM64, Release; .NET 8.0.28 and 10.0.9. Compilation uses prebuilt trees; invocation uses precompiled delegates and excludes expression construction/compilation. Standard and LightExpression are measured separately.

Two fresh process rounds reverse version-loading order, pin execution to one logical CPU, disable tiered compilation, warm both versions, and alternate measurement order. Values below are medians across 14 samples per side (seven per round; 30 ms calibration target).

Measured compilation and invocation allocations match master on every control. Control delegate IL matches master.

Identical-master control runs also varied: compilation -15.2% to +23.4%, invocation -21.5% to +8.9%. Timings below are observations, not a speedup or universal performance-neutrality claim. Cases that fail or produce invalid IL on master have no meaningful before/after invocation ratio; the table uses executable controls that return the expected result in both versions. Framework correctness is tested above; its performance is not measured here.

All table pairs are master → this change. B/op is allocated bytes per operation.

.NET / API	Control	Compile ns/op	Compile B/op	Invoke ns/op	Invoke B/op
10 / Light	add_control	4,001 → 4,146	872 → 872	2.66 → 2.64	0 → 0
10 / Light	constant_switch	5,648 → 5,449	1104 → 1104	3.30 → 3.19	0 → 0
10 / Light	string_runtime_switch	5,268 → 5,349	1176 → 1176	3.32 → 3.39	0 → 0
10 / Standard	add_control	4,065 → 4,046	872 → 872	2.48 → 2.91	0 → 0
10 / Standard	constant_switch	7,072 → 8,542	1104 → 1104	3.09 → 3.17	0 → 0
10 / Standard	string_runtime_switch	9,753 → 8,070	1232 → 1232	3.81 → 3.76	0 → 0
8 / Light	add_control	1,482 → 1,643	872 → 872	2.95 → 2.82	0 → 0
8 / Light	constant_switch	2,581 → 2,347	1104 → 1104	3.30 → 3.96	0 → 0
8 / Light	string_runtime_switch	3,045 → 2,928	1176 → 1176	5.01 → 4.44	0 → 0
8 / Standard	add_control	2,514 → 2,793	872 → 872	3.80 → 3.68	0 → 0
8 / Standard	constant_switch	3,289 → 3,249	1104 → 1104	3.17 → 3.10	0 → 0
8 / Standard	string_runtime_switch	2,709 → 2,621	1232 → 1232	2.92 → 2.94	0 → 0