chore: More spanner perf

[codekeyz]

No description provided.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 76.86567% with 31 lines in your changes missing coverage. Please review.

Project coverage is 71.48%. Comparing base (18210de) to head (014f31b).

Files	Patch %	Lines
packages/spanner/lib/src/tree/node.dart	24.32%	28 Missing ⚠️
...ackages/spanner/lib/src/parametric/definition.dart	96.77%	1 Missing ⚠️
packages/spanner/lib/src/parametric/utils.dart	96.55%	1 Missing ⚠️
packages/spanner/lib/src/route/action.dart	80.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #131      +/-   ##
==========================================
- Coverage   72.25%   71.48%   -0.78%     
==========================================
  Files          46       45       -1     
  Lines        1521     1543      +22     
==========================================
+ Hits         1099     1103       +4     
- Misses        422      440      +18     

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