[tobias-tengler]

Parsing an incoming multipart variable path creates a Split token array and strings for skipped tokens and numeric tokens that are immediately parsed as indexes.

This PR scans the original path as spans and creates strings only for retained keys. The existing linked key/index segments, right-to-left parsing, validation order, current-culture numeric behavior and file bindings are preserved.

Method	Version	Mean	Ratio	Allocated	Alloc Ratio
Incoming map, empty control	main	7.913 ns	1.00	56 B	1.00
Incoming map, empty control	PR	7.928 ns	1.00	56 B	1.00
Incoming map, two-file list	main	225.143 ns	1.00	912 B	1.00
Incoming map, two-file list	PR	187.629 ns	0.83	688 B	0.75
Incoming map, nested two-file list	main	293.119 ns	1.00	1208 B	1.00
Incoming map, nested two-file list	PR	258.234 ns	0.88	854.5 B	0.71
Incoming map, one file	main	94.999 ns	1.00	401.5 B	1.00
Incoming map, one file	PR	79.839 ns	0.84	332.5 B	0.83

[github-actions]

Patch coverage

100.0% of changed lines covered (27/27)

File	Covered	Changed	Patch %
…/AspNetCore/src/AspNetCore.Pipeline/Parsers/VariablePath.cs	27	27	100.0% 🟢

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Project coverage: 59.0% (311578/527844 lines)

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